Columbia subject headings:
Botany--West (U.S.)--Handbooks, manuals, etc.
Forest animals--West (U.S.)--Identification.
Forest ecology--West (U.S.)--Handbooks, manuals, etc.
Forest plants--West (U.S.)--Identification.
Natural history--West (U.S.)--Handbooks, manuals, etc.
Zoology--West (U.S.)--Handbooks, manuals, etc.
Harvard subject headings:
Botany--West (U.S.)--Handbooks, manuals, etc.
Forest animals--West (U.S.)--Identification.
Forest ecology--West (U.S.)--Handbooks, manuals, etc.
Forest plants--West (U.S.)--Identification.
Natural history--West (U.S.)--Handbooks, manuals, etc.
Zoology--West (U.S.)--Handbooks, manuals, etc.
Princeton subject headings: