Columbia subject headings:
Harvard subject headings:
Dams--Economic aspects--Columbia River Watershed.
Dams--Economic aspects--Snake River Watershed (Wyo.-Wash.)
Pacific salmon--Effect of water levels on--Columbia River Watershed.
Pacific salmon--Effect of water levels on--Snake River Watershed (Wyo.-Wash.)
Reservoir drawdown--Economic aspects--Columbia River Watershed.
Reservoir drawdown--Economic aspects--Snake River Watershed (Wyo.-Wash.)
Princeton subject headings:
Dams--Economic aspects--Columbia River Watershed.
Dams--Economic aspects--Snake River Watershed (Wyo.-Wash.).
Pacific salmon--Effect of water levels on--Columbia River Watershed.
Pacific salmon--Effect of water levels on--Snake River Watershed (Wyo.-Wash.).
Reservoir drawdown--Economic aspects--Columbia River Watershed.
Reservoir drawdown--Economic aspects--Snake River Watershed (Wyo.-Wash.).