Columbia subject headings:
Social security--Latin America--Periodicals.
Social security--Law and legislation--Latin America--Periodicals.
Social security--Law and legislation--Spain--Periodicals.
Social security--Periodicals.
Social security--Spain--Periodicals.
Harvard subject headings:
Insurance--Periodicals
Social security--Latin America--Periodicals.
Social security--Periodicals
Social security--Spain--Periodicals.
Princeton subject headings: