Columbia subject headings:
Harvard subject headings:
Ostrów Mazowiecka Region (Poland)--History.
World War, 1939-1945--Underground movements--Poland--Ostrów Mazowiecka Region.
Princeton subject headings:
Poland. Polskie Siły Zbrojne. Armia Krajowa
World War, 1939-1945--Underground movements--Poland--Ostrów Mazowiecka.