Watson, Patty Jo; Yarnell, Richard A. (October 1966). "Archaeological and Paleoethnobotanical Investigations in Salts Cave, Mammoth Cave National Park, Kentucky". American Antiquity. 31 (6): 842–849. doi:10.2307/2694457. JSTOR2694457. S2CID161912572.
jstor.org
Watson, Patty Jo; Yarnell, Richard A. (October 1966). "Archaeological and Paleoethnobotanical Investigations in Salts Cave, Mammoth Cave National Park, Kentucky". American Antiquity. 31 (6): 842–849. doi:10.2307/2694457. JSTOR2694457. S2CID161912572.
Watson, Patty Jo; Yarnell, Richard A. (October 1966). "Archaeological and Paleoethnobotanical Investigations in Salts Cave, Mammoth Cave National Park, Kentucky". American Antiquity. 31 (6): 842–849. doi:10.2307/2694457. JSTOR2694457. S2CID161912572.