2014 Examination of Krapina Neandertals at the Hrvatski prirodoslovini muzej (Zagreb).
2013 Examination of KNM-ER 60000, 62000 and 62003 casts in the Department of Anthropology, Boston University.
2009 Study of Avar Medieval Hungarian remains at the Magyar Térmészéttudományi Muzeum (Budapest), Krapina dentitions at Hrvatski prirodoslovini muzej(Zagreb), and examination of the Mulan Mountain mandible (Homo sapiens cave, Chongzuo) at the IVPP, Beijing.
2008 Study of Krapina hominids at Hrvatski prirodoslovini muzej(Zagreb).
2006 Examination of australopithecine remains at the Transvaal Museum (Pretoria); australopithecine and early Homo remains at the National Museums of Kenya (Nairobi); Avar Medieval Hungarian remains at the Magyar Térmészéttudományi Muzeum (Budapest); Krapina Neandertals at the Hrvatski prirodoslovini muzej(Zagreb).
2005 Examination of Buia cranium reconstruction and Buia pelvis, Department of Anthropology, University of Rome; Study of Krapina hominids at Hrvatski prirodoslovini muzej(Zagreb) and site visits to Krapina and Vindija.
2004 Examination of Ceprano cranium at the Department of Anthropology, University of Rome, and Dmanisi remains at the Georgian Natural History Museum.
1999 (with Alfredo Coppa) Analysis of non-metric traits of the dentition for Holocene and Late Pleistocene human remains; examination of Can Llobbateres Dryopithecus laietanus skeleton and various Oreopithecus remains at the Institut de Paleontologia Miquel Crusafont (Sabadell); study of Krapina and Vindija hominids at Hrvatski prirodoslovini muzej(Zagreb); Examination of Dmanisi and Sakajia remains at the Georgian Natural History Museum, and visit to the Dmanisi site.
1997 Examination of Neandertal remains at the University of Bordeaux, Department of Anthropology.
1996 Examination of Jinniushan pelvis cast at University of Delaware, comparative analysis of the pelvis at the University of Pennsylvania.
1995 Study of Krapina and Vindija hominids at Hrvatski prirodoslovini muzej(Zagreb) and site visits to both caves; examination of bones from Orce, and human remains from Cabezo Gordo and Zafarraya; site visits to Zafarraya Cave and Cave of the Angels.
1992 Examination of Atapuerca specimens and site visit to the Atapuerca caves(near Burgos); study of Dolní Vĕstonice specimens at Dolní Vĕstoniceand Anthropos Institute, Brno; study of Pavlov and Zlatý Kůn at theAntropologické Oddĕlení, Národní Museum, Prague; site visit to theMladeč cave; examination of Trinil 1 and 2 and Kedung Brubus atRijksmuseum van Natuurlijke Historie, Leiden; study of Kebara 2, AmudVII, and Ohalo 2 at the Department of Anatomy, University of Tel Aviv;site visit to Hayonim Cave, study of St. Césaire, Marillac specimens,Combe Grenal specimens, Biache, and a cast of Saltzgitter-Lebenstedt atthe Paleoanthropology Laboratory, Université de Bordeaux.
1991 Study of Gongwangling and Chouhu at the Institute for VertebratePaleontology and Paleoanthropology (Beijing), and Jinniushan and Laishuat the Department of Archaeology, Beijing University; study of Senckenberg Museum Homo erectus specimens, Dmanisi and Urhanamandibles, and Sangiran 31 cast, at the Senckenberg Museum (Frankfurt)
1989 Study of Klasies River Mouth Main Cave specimens in the South AfricanMuseum (Capetown), study of archaeologically provenienced and datedHolocene specimens from the southern Cape coastal regions in the SouthAfrican Museum and the Anatomy Department of the University ofCapetown, examination of the Kaloma remains at the McGregor Museum(Kimberly), study of Swartkrans members 1-3 hominids at the TransvaalMuseum (Pretoria), and of the Sterkfontein members 4 and 5 hominids atthe Department of Anatomy, University of the Witwatersrand(Johannesburg).
1988 Study of East African Plio-Pleistocene fossil hominid casts at theDepartment of Anatomy and Cell Biology, John Hopkins University(Baltimore); study of fossil hominid skeletal material at the Hrvatskiprirodoslovini muzej (Zagreb) and Anthropos Institute Morvaské Muzeum(Brno); site visits to Vindija (Croatia), Crvena Stijena [Red Cave](Monte Negro), and in Moravia Mladeč, Dolní Vĕstonice, and Milovice.
1986 Study of fossil hominid and non-human hominoid material at the NationalMuseum of Wales (Cardiff), British Museum of Natural History (London),Anthropologische Abteilung of the Natur Historisches Museum Wein,Institüt für Anthropologie und Humangenetic Universität Tubingen, Anthropologische Staatsamlungen München, Anthropos Institute MorvaskéMuzeum (Brno), Hrvatski prirodoslovini muzej (Zagreb), and site visitsto Předmostí, Mladeč, and Vindija.
1985 Site visits to Sterkfontein, Swartkrans, Kromdraai, and Bushman RockShelter (Republic of South Africa) during Taung Diamond JubileeInternational Symposium.
1984 Study of fossil hominid and non-human hominoid material in the AmericanMuseum of Natural History “Ancestors: Four Million Years of Humanity”exhibit study sessions (New York); Study of fossil and recentAustralian Aboriginal specimens at University of New England Departmentof Prehistory (Armidale), University of Melbourne Medical SchoolDepartment of Anatomy, National Museum of Victoria (Melbourne),Department of Prehistory, Research School of Pacific Studies,Australian National University (Canberra).
1982 Study of fossil hominid and hominoid primate material at the Institutefor Vertebrate Paleontology and Paleoanthropology (Beijing) and fieldvisits in China to Xujiayao, Dingcun (Tingtsun), Yuanmou, Lufeng, Dali,Liujiang, Lotus Cave, Gigantopithecus Cave; examination of fossilAustralian material in the Department of Prehistory, Research School ofPacific Studies, Australian National University (Canberra).
1981 Study of fossil hominid and hominoid primate material at University ofPennsylvania (Philadelphia), American Museum of Natural History (NewYork), Harvard Peabody Museum (Boston), Kent State University, and YalePeabody Museum (New Haven).
1980 Study of fossil hominid and hominoid primate material at Laboratoired’Anthropologie, Faculté de Medicine, Université d’Zix-Marseille(Marseille), Laboratoire de Paléontologie des Vertébres et dePaléontologie Humaine, University of Paris (Paris), British Museum ofNatural History (London), Slovenské Narodné Múzeum (Bratislava),Geološko-Paleontološki muzej (Zagreb), Geological and PaleontologicalInstitute, University of Thessaloniki (Thessaloniki), Hadassah MedicalSchool (Jerusalem), Rockefeller Museum (Jerusalem), Institute ofPrehistory, Hebrew University (Jerusalem), Department of Antiquities(Jerusalem), Transvaal Museum (Pretoria), Department of Anatomy,University of the Witwatersrand (Johannesburg), South African Museum(Capetown), National Museum of Bloemfontein, and TILLMIAP (Nairobi)
1979 Study of fossil hominid and hominoid primate remains at the BritishMuseum of Natural History (London), Laboratoire de Paléontologie desVertébres et de Paléontologie humaine, University of Paris (Paris),Musée de l’homme (Paris), Collection Cotte (Lyon), Natur-Museum undForschungs-Institut Senckenberg (Frankfurt), Geološko-Paleontološkizbirka i laboratorij za krš, JAZU (Zagreb), Institute of VertebratePaleontology and Paleoanthropology, Academia Sinica (Peking), ProjekPenelitian Paleoanthropologi Nasional, Falcultas Kedkteran, UniversitasGadjah Mada (Jogjarkarta), Museum Geologi (Bandung), Department ofPrehistory, Research School of Pacific Studies, Australian NationalUniversity (Canberra), Department of Anatomy, University of Sydney(Sydney), Cleveland Museum of Natural History. Site visit toZhoukoudian.
1978 Study of Omo fossil hominid remains (Berkeley); study of fossil hominid and hominoid primate remains at the British Museum of Natural History (London), Institut royal des Sciences naturelles de Belgique(Brussels), Reinisches Landesmuseum (Bonn), Städtischen Museum(Wiesbaden), Goethe Universität (Frankfurt), Natur-Museum andForschungs-Institut Senckenberg (Frankfurt), Geologisch-Paleontologisches Institut, Universität Heidelberg (Heidelberg),Geologisch-Paläontologische Abteilung, Staatlisches Museum fürNaturkunde (Stuttgart), Museum für Ur-und Fürhgeschichte Türringens (Weimar), Landesmuseum für Vorgeschichte (Halle/Saale), Geološko- Paleontološki zbirka i laboratorij za krš, JAZU (Zagreb), Geološko- Paleontološki Muzej (Zagreb), Térmészéttudományi Muzeum (Budapest), the collection of M. Kretzoi (Budapest), Anthropos Institute of the Moravian Museum (Brno), Naturhistorisches Museum (Vienna), Museum of Anthropology of Moscow State University (Moscow), Laboratoire de Géologie historique, Faculté des Sciences (Marseille), Musée de l’Homme (Paris), Institut de Paléontologie humaine (Paris), Musée des Antiquités Nationales de Saint Germain-en-Laye (Yvelines), Muséum d’Histoire Naturelle (Paris), Laboratoire de Paléontologie des Vertébres et de Paléontologie Humaine, University of Paris (Paris)
1977 Study of fossil and recent hominoid primate and hominid remains at The International Louis Leakey Memorial Institute for African Prehistory (Nairobi)
1976 Study of fossil hominoid primate and hominid specimens at the British Museum of Natural History (London), Goethe Universität (Frankfurt), Magyar Nemzeti Museum (Budapest), the collection of M. Kretzoi (Budapest), Térmészéttudományi Muzeum (Budapest), Geološko-Paleontološki zbirka i laboratorij za krš, JAZU (Zagreb), Geološko-Paleontološki muzej (Zagreb), and the Geological and Paleontological Institute of the University of Thessaloniki (Thessaloniki)
1975 Examination of the Afar (Ethiopia) australopithecine remains at the Cleveland Museum of Natural History
1974 Study of Libben Native American dental variation at Kent, Ohio
1973 Continued study of East Turkana fossil hominids at the National Museums of Kenya; member of the University of Michigan expedition to Loboi, Baringo District, Kenya, which conducted a preliminary excavation of Middle and Late Pleistocene sites
1972 Four month study of Lower Pleistocene hominids at the Transvaal Museum (Pretoria), University of the Witwatersrand (Johannesburg), National Museums of Kenya, Olduvai Gorge, Lake Turkana, Makapansgat, Sterkfontein, and Swartkrans
1970 Study of Tabun and Skhul material at Harvard Peabody Museum, examination of Omo australopithecines in the laboratory of F.C. Howell at the University of Chicago
1969-71 Studies of primate variation in Hamann-Todd collection
1969 Examination of fossil hominid casts available through the Philadelphia Museum, the Wenner-Gren Foundation, and at the Smithsonian Institute, the University of Chicago and the Harvard Peabody Museum
1968 Dental study at Dickson Mounds (Lewiston, Illinois); dental study at Field Museum of Natural History
1967 Archaeological test excavations in Piatt County, Illinois (with A. Rohn)
1966 Primate morphology study at American Museum of Natural History
1965 Primate morphology study at Field Museum (Chicago); collected genetic information and conducted tests and blood sampling with E. Giles for 1,500 residents of Ticul, Yucatán
