Columbia subject headings:
Chaco War, 1932-1935--Economic aspects.
Paraguay--Economic conditions.
Petroleum industry and trade--Paraguay.
Harvard subject headings:
Bolivia--Economic conditions--1918-1952.
Chaco War, 1932-1935--Finance--Bolivia.
Chaco War, 1932-1935--Finance--Paraguay.
Paraguay--Economic conditions--1918-1954.
Petroleum industry and trade--Political aspects--Bolivia--History.
Petroleum industry and trade--Political aspects--Paraguay--History.
Princeton subject headings:
Bolivia--Economic conditions--1918-1952.
Chaco War, 1932-1935--Finance--Bolivia.
Chaco War, 1932-1935--Finance--Paraguay.
Paraguay--Economic conditions--1918-.
Petroleum industry and trade--Political aspects--Bolivia--History.
Petroleum industry and trade--Political aspects--Paraguay--History.