Columbia subject headings:
Anthropology--Arizona--Petrified Forest National Park.
Indians of North America--Antiquities.
Petrified Forest National Park (Ariz.)--Antiquities.
Harvard subject headings:
Arizona--Antiquities.
Excavations (Archaeology)--Arizona--Petrified Forest National Park.
Indians of North America--Arizona--Petrified Forest National Park--Antiquities.
Petrified Forest National Park (Ariz.)--Antiquities.
Princeton subject headings: