Columbia subject headings:
Tax collection--United States--Statistics.
Taxation--United States--Statistics.
United States. Department of the Treasury--Officials and employees--Salaries, etc.
Harvard subject headings:
Tax collection--United States--Statistics.
Taxation--United States--Statistics.
United States. Department of the Treasury--Officials and employees--Salaries, etc.
Princeton subject headings:
Tax collection--United States--Statistics.
Taxation--United States--Statistics.
United States. Department of the Treasury--Appointments, promotions, salaries, etc.