Columbia subject headings:
Peru--Economic conditions--1918-1968.
Peru--Economic conditions.
World War, 1914-1918--Economic aspects--Peru.
Harvard subject headings:
Peru--Economic conditions--1918-
Peru--Economic conditions--1918-1968
World War, 1914-1918--Economic aspects--Peru.
Princeton subject headings:
Peru--Economic conditions--1918-
World War, 1914-1918--Economic aspects--Peru.