Columbia subject headings:
Europe, Central--History--20th century.
Europe, Central--Politics and government--20th century.
Poland--History--1918-1945.
Harvard subject headings:
Civil war--Europe, Eastern--History--20th century.
Europe, Eastern--History, Military--20th century.
Nationalism--Poland--History--20th century.
Poland--History--Wars of 1918-1921
Poland--Politics and government--1918-1945
Princeton subject headings:
Europe, Central--History--20th century.
Europe, Central--Politics and government--20th century.
Poland--History--1918-1945.