TY  - GEN
AU  - Lange,Andre
AU  - Soudart,E.A.
TI  - Treatise on cryptography
SN  - 0894120557 (pbk.)
U1  - 652.8,LAN 
PY  - 1981///
CY  - Laguna Hills, Calif.
PB  - Aegean Park Press
KW  - Cryptography
N1  - Part.1 Historical Exposition (Page-1), Part.2 Cryptography by Letters and Numericals (Page-39), Part.3 Cryptography by signs and Symbols (Page-111)
ER  -