[18]Helmut de Terra, “New Approach to the Problem of Man’s Origin,” Science, 124:1282-1285 (1956); William S. Straus, Jr., “Oreopithecus bambolii,” Science, 126:345-346 (1957).
[19]Willard F. Libby, Radiocarbon Dating (1955).
[20]A. Haring and A. E. de Vries, “Radiocarbon Dating Up to 70,000 Years by Isotopic Enrichment,” Science, 128:472-473 (1958).
[21]“Archeological Discoveries in Iraq,” Science, 126:834-835 (1957).
[22]Henry F. Osborn, Men of the Old Stone Age (1915), 351. Nels C. Nelson, “Succession of Prehistoric Ages in Egypt and in Europe” (chart), in Henry F. Osborn, The Age of Man (1944), 44. Kirtley F. Mather, Sons of the Earth (1930), 160.
[23]Frederick E. Zeuner, Dating the Past (1946), 290.
[24]Hallam L. Movius, Jr., “Radiocarbon Dates and Upper Palaeolithic Archaeology in Central and Western Europe,” Current Anthropology, 1:357 (1960).
[25]Robert Braidwood, personal communication, 1946. Mather, op. cit., 160-161. Peake and Fleure, Hunters and Artists (The Corridors of Time, Vol. 2, 1927), 91.
[26]Zeuner, “The Pleistocene Chronology of Central Europe,” Geological Magazine, 1935, opp. 357. Movius, op. cit.
[27]Mather, op. cit., 161. Zeuner, Dating the Past, 200. Movius, op. cit.