Columbia subject headings:
Mexico--Relations--United States--Bibliography--Periodicals.
United States--Relations--Mexico--Bibliography--Periodicals.
Harvard subject headings:
Mexico--Relations--United States--Bibliography--Periodicals.
United States--Relations--Mexico--Bibliography--Periodicals.
Princeton subject headings:
Mexico--Relations--United States--Bibliography--Periodicals.
United States--Relations--Mexico--Bibliography--Periodicals.