Columbia subject headings:
Harvard subject headings:
Paleoecology--West (U.S.)
Paleontology--Pleistocene
Paleontology--West (U.S.)
Vertebrates, Fossil
Princeton subject headings:
Paleoecology--West (U.S.).
Paleontology--Pleistocene.
Paleontology--West (U.S.)
Vertebrates, Fossil.