Columbia subject headings:
Harvard subject headings:
Colorado River (Colo.-Mexico)--Description and travel.
Colorado River (Colo.-Mexico)--Environmental conditions.
Owen, David, 1955---Travel--Colorado River (Colo.-Mexico)
Stream ecology--Colorado River (Colo.-Mexico)
Water-supply--West (U.S.)
Princeton subject headings:
Colorado River (Colo.-Mexico)--Description and travel.
Colorado River (Colo.-Mexico)--Environmental conditions.
Owen, David, 1955---Travel--Colorado River (Colo.-Mexico).
Stream ecology--Colorado River (Colo.-Mexico).
Water-supply--West (U.S.).