Columbia subject headings:
Harvard subject headings:
Conservation of natural resources--Mexican-American Border Region--Congresses.
Ecosystem management--Mexican-American Border Region--Congresses.
Environmental protection--Mexican-American Border Region--Congresses.
Natural areas--Recreational use--Environmental aspects--Mexican-American Border Region--Congresses.
Outdoor recreation--Mexican-American Border Region--Congresses.
Wildlife management--Mexican-American Border Region--Congresses.
Princeton subject headings:
Conservation of natural resources--Mexican-American Border Region--Congresses.
Ecosystem management--Mexican-American Border Region--Congresses.
Outdoor recreation--Mexican-American Border Region--Congresses.
Wildlife management--Mexican-American Border Region--Congresses.