Taylor, R. E.; Payen, Louis A.; Slota, Peter J., Jr (April 1992). “The Age of the Calaveras Skull: Dating the "Piltdown Man" of the New World.”. American Antiquity57 (2): 269–275. doi:10.2307/280732. JSTOR280732.
jstor.org
Taylor, R. E.; Payen, Louis A.; Slota, Peter J., Jr (April 1992). “The Age of the Calaveras Skull: Dating the "Piltdown Man" of the New World.”. American Antiquity57 (2): 269–275. doi:10.2307/280732. JSTOR280732.