Columbia subject headings:
Harvard subject headings:
Germany (East)--Economic conditions.
Germany (East)--Social conditions.
Germany (East)--Social policy.
Poland--Economic conditions
Poland--Social conditions
Poland--Social policy.
Socialism and society--History.
Socialism and society.
Socialism--Germany (East)
Socialism--Poland
Princeton subject headings:
Socialism and society--Germany (East).
Socialism and society--Poland--History.
Socialism--Germany (East)
Socialism--Poland--History.