Columbia subject headings:
Belgium--Economic conditions--1918-1945.
Economic policy.
Industrial policy.
Netherlands--Economic conditions--1918-1945.
Switzerland--Economic conditions--1918-1945.
Harvard subject headings:
Belgium--Economic conditions--1918-1945.
Economic policy
Industrial policy
Netherlands--Economic conditions--1918-
Switzerland--Economic conditions--1918-
Princeton subject headings:
Belgium--Economic conditions--1918-1945.
Economic policy.
Industrial policy.
Netherlands--Economic conditions--1918-.
Switzerland--Economic conditions--1918-.