Columbia subject headings:
Echeverría, Luis, 1922-
Mexico--Foreign relations--1970-1988.
Mexico--Politics and government--1946-1970.
Harvard subject headings:
Echeverría, Luis, 1922-
Mexico--Foreign relations--1970-1988.
Mexico--Foreign relations.
Mexico--Politics and government--1946-1970
Princeton subject headings:
Echeverría, Luis, 1922-2022.
Mexico--Foreign relations--1970-1988.
Mexico--Politics and government--1946-1970.