Kagan, Neil National Geographic The secret history of World War II : spies, code breakers & covert operations. Neil Kagan; Stephen G Hyslop. - U.S.A: Blackstone Audio, 2016. - 352p. ills. 28cm. includes index. ISBN: 9781426217012 Subjects--Topical Terms: Military intelligence. Dewey Class. No.: 940.5485 / KAS 2016