Columbia subject headings:
Mexico--History--1910-1946--Sources.
Mexico--Relations--United States--Sources.
United States--Relations--Mexico--Sources.
Harvard subject headings:
Mexico--History--1910-1946--Sources.
Mexico--Relations--United States--Sources.
United States--Relations--Mexico--Sources.
Princeton subject headings:
Mexico--History--1910-1946--Sources.
Mexico--Relations--United States--Sources.
United States--Relations--Mexico--Sources.