Columbia subject headings:
Harvard subject headings:
Pacific salmon--Migration--Columbia River.
Pacific salmon--Migration--Snake River (Wyo.-Wash.)
Pacific salmon--Research--Columbia River.
Pacific salmon--Research--Snake River (Wyo.-Wash.)
Princeton subject headings:
Pacific salmon--Migration--Columbia River.
Pacific salmon--Migration--Snake River (Wyo.-Wash.).
Pacific salmon--Research--Columbia River.
Pacific salmon--Research--Snake River (Wyo.-Wash.).