Columbia subject headings:
Chile--Foreign relations--Sources.
Mexico--Foreign relations--Sources.
Mexico--History--Revolution, 1910-1920--Sources.
United States--Foreign relations--Sources.
Harvard subject headings:
Chile--Foreign relations--Sources.
Mexico--Foreign relations--Sources.
Mexico--History--Revolution, 1910-1920--Sources.
United States--Foreign relations--Sources.
Princeton subject headings:
Chile--Foreign relations--Mexico--Sources.
Mexico--Foreign relations--Chile--Sources.
Mexico--History--Revolution, 1910-1920--Sources.