Columbia subject headings:
Endangered species--California--Delta Region.
Fish habitat improvement--California--Delta Region.
Fishes--Conservation--California--Delta Region.
Harvard subject headings:
Endangered species--California--Delta Region.
Fish habitat improvement--California--Delta Region.
Fishes--Conservation--California--Delta Region.
Princeton subject headings:
Endangered species--California--Delta Region.
Fish habitat improvement--California--Delta Region.
Fishes--Conservation--California--Delta Region.