Columbia subject headings:
Fishes--Conservation--Columbia River Watershed.
Habitat conservation--Columbia River Watershed.
Salmon--Columbia River Watershed.
Harvard subject headings:
Fishes--Conservation--Columbia River Watershed.
Habitat conservation--Columbia River Watershed.
Salmon--Columbia River Watershed.
Princeton subject headings:
Fishes--Conservation--Columbia River Watershed.
Habitat conservation--Columbia River Watershed.
Salmon--Columbia River Watershed.