Columbia subject headings:
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States. President's Commission on the United States Postal Service.
Harvard subject headings:
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States. President's Commission on the United States Postal Service.
Princeton subject headings:
Postal service--United States--Management--Evaluation.
United States Postal Service--Evaluation.
United States. President's Commission on the United States Postal Service