Columbia subject headings:
Harvard subject headings:
Industries--Mexican-American Border Region--History.
Industries--Texas--History.
Mexican-American Border Region--Population--History.
Mexican-American Border Region--Social conditions.
Texas--Population--History.
Princeton subject headings:
Industries--Mexican-American Border Region--History.
Industries--Texas--History.
Mexican-American Border Region--Population--History.
Mexican-American Border Region--Social conditions.
Texas--Population--History.