Columbia subject headings:
Cocopa Indians--History.
Cocopa Indians--Mexico--Mexicali--History.
Cocopa Indians--Social life and customs.
Harvard subject headings:
Cocopa Indians--History.
Cocopa Indians--Mexico--Mexicali--History.
Cocopa Indians--Social life and customs.
Princeton subject headings:
Cocopa Indians--Mexico--History.
Cocopa Indians--Mexico--Social life and customs.