Columbia subject headings:
Harvard subject headings:
Antiquities, Prehistoric.
Excavations (Archaeology)
Geology, Stratigraphic--Quaternary
Geology, Stratigraphic--Tertiary
Prehistoric peoples.
Princeton subject headings:
Excavations (Archaeology)
Geology, Stratigraphic--Quaternary.
Geology, Stratigraphic--Tertiary.
Prehistoric peoples.