Columbia subject headings:
Harvard subject headings:
Brazil--Antiquities.
Indians of South America--Brazil--Piauí--Antiquities.
Petroglyphs--Brazil--Piauí.
Piauí (Brazil)--Antiquities.
Rock paintings--Brazil--Piauí.
Princeton subject headings:
Brazil--Antiquities.
Indians of South America--Brazil--Piauí--Antiquities.
Petroglyphs--Brazil--Piauí.
Piauí (Brazil)--Antiquities.
Rock paintings--Brazil--Piauí.