Columbia subject headings:
Northern and Western Territories (Poland)--History.
Poland--Politics and government--1918-1945.
World War, 1939-1945--Territorial questions--Poland--Northern and Western Territories.
World War, 1939-1945--Underground movements--Poland--Northern and Western Territories.
Harvard subject headings:
Princeton subject headings:
Poland--Boundaries--Germany.
World War, 1939-1945--Territorial questions--Poland.