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2. Restos de moluscos y mamfferos cuaternarios procedentes de Loltún, Yucatán;Alvarez;Cuademo de Trabajo del Departmento de Prehistoria, Institute Nacional de Antropología e Historia, México,1982
3. The archaeological and faunal material from Williams Cave, Guadalupe Mountains, Texas;Ayer;Proceedings of the Academy of Natural Sciences of Philadelphia,1936
4. Two Pleistocene mammalian faunas from Alachua County, Florida;Bader;Bulletin of the Florida State Museum Biological Sciences,1957