Columbia subject headings:
Conifers--Ecology--West (U.S.)
Forest ecology--West (U.S.)
Lake ecology--West (U.S.)
Stream ecology--West (U.S.)
Harvard subject headings:
Conifers--Ecology--West (U.S.)
Forest ecology--West (U.S.)
Lake ecology--West (U.S.)
Stream ecology--West (U.S.)
Princeton subject headings:
Conifers--West (U.S.)--Ecology.
Forest ecology--West (U.S.).
Lake ecology--West (U.S.).
Stream ecology--West (U.S.).