Columbia subject headings:
Aguirre Cerda, Pedro, 1879-1941--Correspondence.
Chile--History--1920-1970--Sources.
Chile--Politics and government--1920-1970--Sources.
Presidents--Chile--Correspondence.
Harvard subject headings:
Aguirre Cerda, Pedro, 1879-1941--Correspondence.
Chile--History--1920-1970--Sources.
Chile--Politics and government--1920-1970--Sources.
Chile--Politics and government--1920-1970.
Presidents--Chile--Correspondence.
Princeton subject headings:
Aguirre Cerda, Pedro, 1879-1941--Correspondence.
Chile--History--1920-1970--Sources.
Chile--Politics and government--1920-1970--Sources.
Presidents--Chile--Correspondence.