Columbia subject headings:
Mexico--Foreign relations--1867-1910--Sources.
Mexico--Foreign relations--1867-1910.
Mexico--Foreign relations--Spain--Sources.
Mexico--Foreign relations--Spain.
Spain--Foreign relations--1814-1886--Sources.
Spain--Foreign relations--1814-1886.
Spain--Foreign relations--Mexico--Sources.
Spain--Foreign relations--Mexico.
Harvard subject headings:
Mexico--Foreign relations--1867-1910
Mexico--Foreign relations--1867-1910--Sources.
Mexico--Foreign relations--Spain--Sources.
Mexico--Foreign relations--Spain.
Spain--Foreign relations--1814-1886--Sources.
Spain--Foreign relations--1814-1886.
Spain--Foreign relations--Mexico
Spain--Foreign relations--Mexico--Sources.
Princeton subject headings:
Mexico--Foreign relations--1867-1910.
Mexico--Foreign relations--Spain.
Spain--Foreign relations--1814-1886.
Spain--Foreign relations--Mexico.