Columbia subject headings:
Social security beneficiaries--United States--Statistics--Periodicals.
Social security--United States--Statistics--Periodicals.
Harvard subject headings:
Social security beneficiaries--United States--Statistics--Periodicals.
Social security--United States--Statistics--Periodicals.
Princeton subject headings:
Periodicals.
Social security beneficiaries--United States--Statistics--Periodicals.
Social security--United States--Statistics--Periodicals.
Social security--United States--Statistics.
Statistics.