Columbia subject headings:
Warsaw (Poland)--History--Pictorial works.
Warsaw (Poland)--History--Siege, 1939--Pictorial works.
World War, 1939-1945--Poland--Warsaw--Pictorial works.
Harvard subject headings:
Warsaw (Poland)--History--Siege, 1939--Pictorial works.
World War, 1939-1945--Photography.
Princeton subject headings:
Warsaw (Poland)--History--Siege, 1939--Pictorial works.
World War, 1939-1945--Photography.