Columbia subject headings:
Public welfare--United States.
Social policy.
Social security--United States.
Social service--United States.
Social service.
Harvard subject headings:
Public welfare--United States
Social policy.
Social security--United States
Social service--United States
Social service.
Princeton subject headings:
Public welfare--United States.
Social policy.
Social security--United States.
Social service--United States.
Social service.