The Occurrence of Flints and Extinct Animals in Pluvial Deposits Near Clovis, New Mexico, Part IV: Report on Excavation at the Gravel Pit, 1936. John Lambert Cotter. (Proceedings of the Academy of Natural Sciences, Vol. 89: 1–16, Philadelphia, 1937.) - The Archeological and Faunal Material from Williams Cave, Guadeloupe Mountains, Texas. Mary Youngman Ayer. (The same, Vol. 88: 599–619, 1936.)