Columbia subject headings:
Poland--History--Occupation, 1939-1945.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Underground movements--Poland.
Harvard subject headings:
Poland--History--Occupation, 1939-1945
Poland--History--Occupation, 1939-1945--Sources.
Poland. Polskie Siły Zbrojne. Armia Krajowa
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Governments in exile.
World War, 1939-1945--Underground movements--Poland.
Princeton subject headings: