Kahn, David, 1930-
The codebreakers : the story of secret writing / David Kahn. - New York, Macmillan [1967] - xvi, 1164 p. : illus., facsims., ports ; 24 cm.
Includes bibliographical references.
63016109
Cryptography--History.
652.8 / KAC
The codebreakers : the story of secret writing / David Kahn. - New York, Macmillan [1967] - xvi, 1164 p. : illus., facsims., ports ; 24 cm.
Includes bibliographical references.
63016109
Cryptography--History.
652.8 / KAC