Columbia subject headings:
Aerial photography in archaeology.
Photogrammetry--United States.
Remote sensing--United States.
Harvard subject headings:
Aerial photography in archaeology.
Archaeology--Remote sensing
Canyon de Chelly National Monument (Ariz.)--Antiquities.
Chaco Canyon (N.M.)--Antiquities.
Chaco Culture National Historical Park (N.M.)--Antiquities.
Indians of North America--Arizona--Canyon de Chelly National Monument--Antiquities.
Indians of North America--New Mexico--Chaco Culture National Historical Park--Antiquities.
New Mexico--Antiquities
Princeton subject headings: