TY  - BOOK
AU  - Kahn,David
TI  - The codebreakers: the story of secret writing 
SN  - 0684831309 (alk. paper)
U1  - 652/.8 20
PY  - 1996///
CY  - New York
PB  - Scribner
KW  - Cryptography
KW  - History
N1  - Includes bibliographical references (p. 985-987) and index
ER  -