[24]John Paul Moss, _The Antiquity of the Finley Yuma Site: Example of the Geologic Method of Dating_ (MS. of paper read at the 29th International Congress of Americanists, New York, Sept. 5, 1949). Edgar B. Howard, “Folsom and Yuma Points from Saskatchewan,” _American Antiquity_, 4:277-279 (1939). Frank H. H. Roberts, Jr., “On the Trail of Ancient Hunters in the Western United States and Canada,” _Smithsonian Institution, Exploration and Field Work in 1938_, 103-110. Frank Hibben, “Evidence of Early Man in Alaska,” _American Antiquity_, 8:257 (1943). [25]E. H. Sellards, “Fossil Bison and Associated Artifacts from Texas,” _Bulletin, Geological Society of America_, 56:1196-1197 (1945). E. H. Sellards, Glen L. Evans and Grayson E. Meade, “Fossil Bison and Associated Artifacts from Texas.” _Bulletin, Geological Society of America_, 58:927-938 (1947). [26]Froelich G. Rainey, “Archaeology in Central Alaska,” _Anthropological Papers, American Museum of Natural History_, 36:390-401 (1939). Frank Hibben, _op. cit._, 255-258. [27]Alex Krieger, “Artifacts from the Plainview Bison Bed,” _Bulletin, Geological Society of America_, 58:940-941, 951 (1947). [28]_Ibid._, 947, 949. [29]Nels C. Nelson, “Early Migration of Man to America,” _Natural History_, 35:356 (1935). [30]Libby, _op. cit._, 117. [31]Libby, _ibid._, 118. [32]M. R. Harrington, _Gypsum Cave, Nevada_ (Southwest Museum Papers, no. 8, 1933). [33]Ernst Antevs, “Climate and Early Man in North America,” in _Early Man_, 128, and personal communication to H. M. Wormington, 1949. E. W. C. and W. H. Campbell and others, _The Archaeology of Pleistocene Lake Mohave_ (Southwest Museum Papers, no. 11, 1937), 9-44. E. W. C. and W. H. Campbell, _The Pinto Basin Site_ (Southwest Museum Papers, no. 9, 1935), 1-51. [34]Malcolm J. Rogers, _Early Lithic Industries of the Lower Basin of the Colorado River and Adjacent Desert Areas_ (San Diego Museum Papers, no. 3, 1939), 70, pl. 21, 74. [35]Robert F. Heizer and E. Lemert, _Observations on an Archaeological Site in Topanga Canyon, Los Angeles County_ (University of California Publications in American Archaeology and Ethnology, vol. 44, 237-258, 1947), Heizer, “Notes and News: Pacific Coast Area,” _American Antiquity_, 13:270 (1948). [36]Wesley L. Bliss, “An Archaeological and Geological Reconnaissance of Alberta, Mackenzie Valley, and Upper Yukon,” _American Philosophical Society Yearbook_, 1938, 136-139. [37]M. M. Leighton, _Geological Aspects of the Finding of Primitive Man near Abilene, Texas_ (Medallion Papers, Gila Pueblo, no. 24, 1936), 40-41. [38]_Ibid._, 34. [39]Harold S. Gladwin, _Excavations at Snaketown_ (Medallion Papers, Gila Pueblo, no. 26, 1937), plate 1, pp. 30-31.