B-17 fortress at war /
Roger A Freeman.
- New York : Charles Scribner's Sons, [1977].
- 192 pages : illustrations (some color), portraits ; 30 cm.
- 358.4 : 623.746.3](73)"1939-1945" (NLA) .
World War, 1939-1945--Aerial operations, American B-17 bomber Military operations, Aerial--American