Columbia subject headings:
Harvard subject headings:
Mexican-American Border Region--Economic conditions.
Mexican-American Border Region--Environmental conditions.
Mexican-American Border Region--History.
Mexican-American Border Region--Politics and government.
Mexican-American Border Region--Population.
Princeton subject headings:
Mexican-American Border Region--Economic conditions.
Mexican-American Border Region--Environmental conditions.
Mexican-American Border Region--History.
Mexican-American Border Region--Politics and government.
Mexican-American Border Region--Population.