Columbia subject headings:
Cocopa Indians--Mexico--Colorado River Delta.
Cocopa Indians--Mexico--Social life and customs.
Colorado River Delta (Mexico)--History.
Ejidos--Mexico--Mexicali Valley--History.
Indians of Mexico--Mexico--Colorado River Delta--History.
Mexicali Valley (Mexico)--History.
Harvard subject headings:
Cocopa Indians--Mexico--Colorado River Delta.
Cocopa Indians--Mexico--Social life and customs.
Colorado River Delta (Mexico)--History.
Ejidos--Mexico--Mexicali Valley--History.
Indians of Mexico--Colorado River Delta--History.
Indians of Mexico--Mexico--Colorado River Delta--History.
Mexicali Valley (Mexico)--History.
Princeton subject headings:
Cocopa Indians--Mexico--Colorado River Delta.
Cocopa Indians--Mexico--Social life and customs.
Colorado River Delta (Mexico)--History.
Ejidos--Mexico--Mexicali Valley--History.
Indians of Mexico--Colorado River Delta--History.
Mexicali Valley (Mexico)--History.