Columbia subject headings:
Arid regions--West (U.S.)--Congresses.
Reclamation of land--West (U.S.)--Congresses.
Revegetation--West (U.S.)--Congresses.
Strip mining--Environmental aspects--West (U.S.)--Congresses.
Harvard subject headings:
Arid regions--West (U.S.)--Congresses.
Reclamation of land--West (U.S.)--Congresses.
Revegetation--West (U.S.)--Congresses.
Strip mining--Environmental aspects--West (U.S.)--Congresses.
Princeton subject headings: