Columbia subject headings:
Elephants, Fossil--Ethiopia--Awash River Valley.
Paleontology--Ethiopia--Awash River Valley.
Harvard subject headings:
Elephants, Fossil--Ethiopia--Awash River Valley.
Paleontology--Ethiopia--Awash River Valley.
Paleontology--Pleistocene
Paleontology--Pliocene
Princeton subject headings:
Elephants, Fossil--Ethiopia--Awash River Valley.
Paleontology--Ethiopia--Awash River Valley.
Paleontology--Pleistocene.
Paleontology--Pliocene.