Columbia subject headings:
Manufacturing industries--United States--Classification.
Mineral industries--United States--Classification.
U.S. Census Bureau.
United States--Census, 2002.
Harvard subject headings:
Manufacturing industries--United States--Classification.
Mineral industries--United States--Classification.
U.S. Census Bureau
United States--Census, 2002.
Princeton subject headings:
Manufacturing industries--United States--Classification.
Mineral industries--United States--Classification.
U.S. Census Bureau.
United States--Census, 2002.