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