Columbia subject headings:
Civil service positions--United States--Classification--Bibliography.
United States--Officials and employees--Salaries, etc.--Bibliography.
Harvard subject headings:
Civil service positions--United States--Classification--Bibliography.
United States--Officials and employees--Salaries, etc.--Bibliography.
Princeton subject headings:
Civil service positions--United States--Classification--Bibliography.
United States--Officials and employees--Salaries, etc.--Bibliography.