Norman Franks & others The Jasta War Chronology, 1998, Bloody April….Black September, 1995, and Casualties of the German Air Service 1914-1920; Williamson The Roll of Honour: Royal Flying Corps and Royal Air Force for the Great War; Air Ministry Handbook of German Military and Naval Aviation 1918, Imperial War Museum, boards bowed; and a related title. Most in d/jkts. Mainly VF (6)