Media type: Book Title: The codebreakers : the story of secret writing Contributor: Kahn, David [Author] imprint: New York: Macmillan, 1979 Issue: 9. print. Extent: XVI, 1164 S.; Ill., Kt Language: English ISBN: 0025604600 RVK notation: AM 28500 : Geheimschriften MZ 6250 : Beiträge zu Einzelproblemen Keywords: Kryptologie Origination: Footnote: