[7]Eduard Brückner, “Postglaziale Klimaänderungen und Klimaschwankungen im Bereich der Alpen,” _Die Veränderungen des Klimas seit dem Maximum der letzten Eiszeit_ (Stockholm, 1910), 108.
[8]Milutin Milankovitch, “O Rasporedu suneeve Radijacije na Povrsini Zembljie” (On the Distribution of Solar Radiation on the Surface of the Earth), _Glas Srpske K. Akad._, 91:101-179 (1913), and “Neue Ergebnisse der astronomischen Theorie der Klimaschwankungen,” _Bulletin, Royal Serbian Academy of Science_, 1938, p. 4.
[9]Frederick E. Zeuner, _The Pleistocene Period_ (1945), 167.
[10]Kirtley F. Mather, _Sons of the Earth_ (1930), 106.
[12]Maurice Ewing and William L. Donn, “A Theory of Ice Ages,” _Science_, 123:1061-1066 (1956), and “A Theory of Ice Ages II,” _Science_, 127:1159-1162 (1958), and “Theory of Ice Ages,” _Science_, 129:464-465 (1959).
[13]George C. Simpson, “World Climate During the Quaternary Period,” _Quarterly Journal, Royal Meteorological Society_, 60:425-478 (1934), and “Ice Ages,” _Nature_, 141:591-598 (1938)—reprinted in _Annual Report, Smithsonian Institution_, 1938, 289-302.
[16]A. Vayson de Pradenne, _Prehistory_ (1940), 84-85.
[1]V. Gordon Childe, _Progress and Archaeology_ (1944), 5.
[2]John Frere, “Account of Flint Weapons Discovered at Hoxne in Suffolk,” _Archaeologia_, 13:204-205 (1807).
[3]William Buckland, _Reliquiae Diluvianae_ (1823), 82-98.
[4]Harold Peake, and H. J. Fleure, _Apes and Men_ (_The Corridors of Time_, Vol. 1, 1927), 84.
[5]Gabriel de Mortillet, “Essai d’une classification des cavernes et des stations sous abri, fondée sur les produits de l’industrie humaine,” _Comptes Rendus, Académie des Sciences_, 68:553-555 (1869).
[6]Edith Plant, _Man’s Unwritten Past_ (1942), 29.
[7]W. B. Wright, _Tools and the Man_ (1939), 38.
[8]Robert J. Braidwood, _Prehistoric Men_ (1957), 65, 72.
[9]J. S. Weiner, K. P. Oakley and W. E. Le Gros Clark, “The Solution of the Piltdown Problem,” _Bulletin of the British Museum (Natural History) Geology_, 2:141-146 (1953).
[10]General sources: W. E. Le Gros Clark, _The Fossil Evidence for Human Evolution_ (1955); Marcellin Boule and Henri V. Vallois, _Fossil Men_ (1957); William Howells, _Mankind in the Making_ (1959).
[11]William L. Straus, Jr., “Swanscombe Man,” _Science_, 123:410 (1956).