Columbia subject headings:
Geothermal engineering--West (U.S.)
Geothermal resources--West (U.S.)
Harvard subject headings:
Geothermal engineering--West (U.S.)
Geothermal resources--West (U.S.)
Princeton subject headings:
Geothermal engineering--West (U.S.).
Geothermal resources--West (U.S.).