[40]Cyrus N. Ray, “Report on Some Recent Archaeological Researches in the Abilene Section,” _Bulletin, Texas Archaeological and Paleontological Society_, 2:45-58 (1930). Kirk Bryan and Cyrus N. Ray, “Long Channelled Point Found in Alluvium Beside Bones of _Elephas columbi_,” _Bulletin, Tex. Arch. and Pal. Soc._, 10:267 (1938). Ray, “New Evidences of Ancient Man in Texas Found During Prof. Kirk Bryan’s Visit,” _Bulletin, Tex. Arch. and Pal. Soc._, 10:273. Bryan, “Deep Sites near Abilene, Texas,” _Bulletin, Tex. Arch. and Pal. Soc._, 10:274. [41]C. C. Albritton and Kirk Bryan, “The Quaternary Stratigraphy in the Davis Mountains, etc.,” _Bulletin, Geological Society of America_, 50:1468 (1939). [42]M. M. Leighton, “The Significance of Profiles of Weathering in Stratigraphic Archaeology,” in _Early Man_, 163-172. [43]Kirk Bryan, “Correlation of the Deposits of Sandia Cave, New Mexico, with the Glacial Chronology,” _Smithsonian Miscellaneous Collections_, 99:45-64 (1941). [44]Frank Hibben, “Association of Man with Pleistocene Mammals in the Sandia Mountains, New Mexico,” _American Antiquity_, 2:260-263 (1937), and “Evidences of Early Occupation in Sandia Cave, etc.,” _Smithsonian Miscellaneous Collections_, 99:1-44 (1941). [45]Frank Hibben, “The First Thirty-eight Sandia Points,” _American Antiquity_, 11:257-258 (1946). [46]Frederick Johnson and Frank C. Hibben, “Radiocarbon Dates from Sandia Cave, Correction,” _Science_, 125:234-235 (1957); and Hugo Gross, “Age of the Sandia Culture,” _Science_, 126:305-306 (1957). [47]C. Bertrand Schultz and W. D. Frankforter, “Preliminary Report on the Lime Creek Sites: New Evidence of Early Man in Southwestern Nebraska,” _Bulletin of the University of Nebraska State Museum_, 3:43-62 (1948). [48]C. Bertrand Schultz and W. D. Frankforter, “Notes and News,” _American Antiquity_, 13:279-280 (1948). “How Old is the Oldest American?” _Science Illustrated_, 3:42-45 (1948). C. Bertrand Schultz, Gilbert C. Lueninghoener, and W. D. Frankforter, “Preliminary Geomorphological Studies of the Lime Creek Area” and “Preliminary Report on the Lime Creek Sites, etc.,” _Bulletin, University of Nebraska State Museum_, 3:31-42, 43-62, (1948). H. M. Wormington, personal communication, 1949. [49]Libby, _op. cit._, 107. [50]Robert J. Braidwood, _Prehistoric Men_ (1957), 130. [51]Harold S. Gladwin, _Excavations at Snaketown_ (Medallion Papers, Gila Pueblo, no. 26, 1937), 34. [52]E. B. Sayles and Ernst Antevs, _The Cochise Culture_ (Medallion Papers, Gila Pueblo, no. 29, 1941). [53]Libby, _op. cit._, 112-113. [54]Ernst Antevs, “Geological Age of the Lehner Mammoth Site,” _American Antiquity_, 25:31 (1959).