Columbia subject headings:
Archaeology--Research.
Petroglyphs.
Rock paintings.
Harvard subject headings:
Archaeology--Methodology
Archaeology--Research.
Petroglyphs--Handbooks, manuals, etc.
Petroglyphs.
Rock paintings--Handbooks, manuals, etc.
Rock paintings.
Princeton subject headings:
Archaeology--Research.
Petroglyphs.
Rock paintings.