Columbia subject headings:
Postal rates--United States.
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States Postal Service--Officials and employees--Retirement--Costs.
Harvard subject headings:
Postal rates--United States.
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States Postal Service--Officials and employees--Retirement--Costs.
Princeton subject headings:
Postal rates--United States.
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States Postal Service--Officials and employees--Retirement--Costs.