The Race for Hitler's X-Planes: Britain's 1945 Mission to Capture Secret Luftwaffe Technology by John Christopher English | June 1, 2013 | ISBN: 0752464574 | 224 pages | AZW3 | 7.14 Mb
Hugh W. Cowin - X-planes: Research Aircraft, 1891-1970: A Unique Pictorial Record of Flying Prototypes, Their Designers and Pilots Osprey Publishing | 1999 | ISBN: 1855328763 | English | 98 pages | PDF | 16.76 MB Aviation Pioneers 1