Columbia subject headings:
Indians of North America--Information services.
Information services--United States--Directories.
Natural resources--Information services--United States.
United States. Department of the Interior--Directories.
United States. Department of the Interior--Handbooks, manuals, etc.
United States. Department of the Interior--Information services.
Harvard subject headings:
United States. Department of the Interior--Handbooks, manuals, etc.
United States. Department of the Interior--Information services.
Princeton subject headings: