Columbia subject headings:
Conference of American States Members of the International Labour Organisation (1st : 1936 : Santiago de Chile)
Conference of American States Members of the International Labour Organisation (2d : 1939 : Havana)
Harvard subject headings:
Labor conference of American states (1st : 1936 : Santiago de Chile)
Labor conference of American states (2nd : 1939 : Havana)
Princeton subject headings: