Columbia subject headings:
Communism--Poland.
Poland--Economic conditions--20th century.
Poland--Economic policy.
Poland--Politics and government--20th century.
Harvard subject headings:
Communism--Poland
Poland--Economic conditions--20th century.
Poland--Economic policy
Poland--Politics and government--20th century
Poland--Social conditions
Princeton subject headings:
Communism--Poland.
Poland--Economic conditions--20th century.
Poland--Economic policy.
Poland--Politics and government--20th century.