Columbia subject headings:
Harvard subject headings:
Malta--History--Siege, 1940-1943.
World War, 1939-1945--Aerial operations
World War, 1939-1945--Malta.
Princeton subject headings:
Malta--History--Siege, 1940-1943.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Malta.