Columbia subject headings:
Colombia--Antiquities.
Excavations (Archaeology)--Colombia--San Jorge River Valley.
Indians of South America--Agriculture--Colombia--San Jorge River Valley.
Indians of South America--Colombia--San Jorge River Valley--Antiquities.
Irrigation farming--Colombia--San Jorge River Valley.
Irrigation--Colombia--San Jorge River Valley.
San Jorge River Valley (Colombia)--Antiquities.
Harvard subject headings:
Colombia--Antiquities.
Indians of South America--Colombia--San Jorge River Valley--Antiquities.
San Jorge River Valley (Colombia)--Antiquities.
Princeton subject headings: