Columbia subject headings:
Mexican-American Border Region--Economic conditions--Congresses.
Mexican-American Border Region--Social life and customs--Congresses.
Harvard subject headings:
Mexican-American Border Region--Economic conditions--Congresses.
Mexican-American Border Region--Social life and customs--Congresses.
Princeton subject headings:
Mexican-American Border Region--Economic conditions--Congresses.
Mexican-American Border Region--Social life and customs--Congresses.