Columbia subject headings:
Harvard subject headings:
Glen Canyon Dam (Ariz.)
Powell, Lake (Utah and Ariz.)
Reservoir drawdown--Economic aspects--Powell, Lake, Region (Utah and Ariz.)
Reservoir drawdown--Environmental aspects--Powell, Lake, Region (Utah and Ariz.)
Princeton subject headings:
Glen Canyon Dam (Ariz.)
Powell, Lake (Utah and Ariz.)
Reservoir drawdown--Economic aspects--Powell, Lake, Region (Utah and Ariz.).
Reservoir drawdown--Environmental aspects--Powell, Lake, Region (Utah and Ariz.).