Columbia subject headings:
Instytut Polski i Muzeum Sikorskiego. Archives--Catalogs.
Poland--History--1918-1945--Sources--Bibliography--Catalogs.
World War, 1939-1945--Poland--Sources--Bibliography--Catalogs.
Harvard subject headings:
Instytut Polski i Muzeum Sikorskiego. Archives--Catalogs.
Poland--History--1918-1945--Sources--Bibliography--Catalogs.
World War, 1939-1945--Poland--Sources--Bibliography--Catalogs.
Princeton subject headings:
Instytut Polski i Muzeum Sikorskiego. Archives--Catalogs.
Poland--History--1918-1945--Sources--Bibliography--Catalogs.
World War, 1939-1945--Poland--Sources--Bibliography--Catalogs.