Chapter 4

[1]John Playfair, _Illustrations of the Huttonian Theory of the Earth_
(1802), 388-389.

[2]A. Bernhardi, “Wie kamen die aus dem Norden stammenden
Felsbruchstücke und Geschiebe, welche man in Norddeutschland und den
benachbarten Ländern findet, an ihre gegenwärtigen Fundorte?”
_Jahrbuch für Mineralogie, Geognosie, und Petrefaktenkunde_,
3:257-267 (1832).

[3]Albrecht Penck and Eduard Brückner, _Die Alpen im Eiszeitalter_
(1901-1909).

[4]Ernst Antevs, _Late Glacial Correlations and Ice Recession in
Manitoba_ (Canada Geological Survey, Memoir 168, 1931), 2, 33.

[5]Richard F. Flint, “Chronology of the Pleistocene Epoch,” _Quarterly
Journal, Florida Academy of Sciences_, 8:3-4 (1945).

[6]Ernst Antevs, _The Last Glaciation_ (American Geographical Society,
Research Series, No. 17, 1928), 74-82. R. A. Daly, _The Changing
World of the Ice Age_ (1934), 46. Richard F. Flint, _Glacial Geology
and the Pleistocene Epoch_ (1947), 334-335.

[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.

[11]Zeuner, _op. cit._, 161.

[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.

[14]Zeuner, _op. cit._, 163.

[15]_Ibid._, 164-165.

[16]A. Vayson de Pradenne, _Prehistory_ (1940), 84-85.