Columbia subject headings:
Chaco War, 1932-1935--Sources.
Harvard subject headings:
Bolivia--History--1879-1938.
Chaco War, 1932-1935.
Paraguay--History--1870-1938.
Princeton subject headings:
Bolivia--History--1879-1938.
Chaco War, 1932-1935.
Paraguay--History--1870-1938.