Columbia subject headings:
Harvard subject headings:
Authoritarianism--Poland--History--20th century.
Minorities--Poland--History--20th century.
Poland--Ethnic relations
Poland--Politics and government--1918-1945
Princeton subject headings:
Authoritarianism--Poland--History--20th century.
Minorities--Poland--History--20th century.
Poland--Ethnic relations.
Poland--Politics and government--1918-1945.