Columbia subject headings:
Harvard subject headings:
United States Postal Service--Appropriations and expenditures.
United States--Appropriations and expenditures, 2000.
United States. Department of the Treasury--Appropriations and expenditures.
Princeton subject headings:
United States Postal Service--Appropriations and expenditures.
United States--Appropriations and expenditures, 2000.
United States. Department of the Treasury--Appropriations and expenditures.