Columbia subject headings:
United States--Appropriations and expenditures, 1999.
United States. Department of the Interior--Appropriations and expenditures.
Washington (D.C.)--Appropriations and expenditures.
Harvard subject headings:
United States--Appropriations and expenditures, 1999.
United States. Department of the Interior--Appropriations and expenditures.
Washington (D.C.)--Appropriations and expenditures
Princeton subject headings: