Columbia subject headings:
Harvard subject headings:
Colombia--Politics and government--1930-1946.
Leticia Dispute, 1932-1934.
Peru--Politics and government--1919-1968
Vázquez Cobo, Alfredo, 1869-1941.
Princeton subject headings:
Colombia--Boundaries--Peru.
Leticia Dispute, 1932-1934--Military aspects.
Peru--Boundaries--Colombia.