Chorley, W.R., Royal Air Force Bomber Command Losses of the Second World War, 7 volumes: 1939-1940, 159pp; 1941, 224pp; 1942, 318pp; 1943, 494pp; 1944, 576pp; 1945, 224pp; Operational Training Units 1940-47, 373pp, paperback, generally very good condition (7) £70-90