Christopher Kasparek

title	ISBN-13 (ISBN-10)	year of publica- tion	other author(s)
Enigma: How the German Machine Cipher Was Broken, and How It Was Read by the Allies in World War Two	978-O-313-27OO7-9 (O-313-27OO7-4)	1984	Thomas F. Troy · Wladyslaw Kozaczuk