Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Arizona--Tucson.
Houghton Road Site (Tucson, Ariz.)
Indians of North America--Arizona--Houghton Road Site (Tucson)--Antiquities.
Indians of North America--Arizona--Tucson--Antiquities.
Sonoran Desert--Antiquities.
Tucson (Ariz.)--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--Arizona--Tucson.
Houghton Road Site (Tucson, Ariz.)
Indians of North America--Arizona--Tucson--Antiquities.
Tucson (Ariz.)--Antiquities.