0.28 C. Bertrand Schultz Loren Eiseley, Paleontological Evidence for the Antiquity of the Scottsbluff Bison Quarry and Its Associated Artifacts, American Anthropologist, 1935.

{ paleolithic upper stone tools }	0.28
{ fact point evidence anthropologist }	0.18
{ archaeological archaeology sites american }	0.16
{ found feet stone small }	0.12