Columbia subject headings:
Harvard subject headings:
Environmental policy--Mexican-American Border Region--Periodicals.
Environmental protection--Mexican-American Border Region--Periodicals.
Mexican-American Border Region--Environmental conditions--Periodicals.
United States. Good Neighbor Environmental Board--Periodicals.
Princeton subject headings:
Environmental protection--Mexican-American Border Region--Periodicals.
Mexican-American Border Region--Environmental conditions--Periodicals.
Periodicals.