Columbia subject headings:
Harvard subject headings:
Intelligence service--Poland--History--20th century.
Poland. Polskie Siły Zbrojne. Armia Krajowa--History.
World War, 1939-1945--Military intelligence--Poland.
Princeton subject headings:
Military intelligence--Poland--History.
Poland. Polskie Siły Zbrojne. Armia Krajowa
World War, 1939-1945--Secret service--Poland.