Codes & Secret Writing: Authorized Abridgement

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SKU:AA/SC/16783

Codes; Secret Writing; Authorized Abridgement. Step-by-Step explanations of how secret codes can be made. Here you can practice both encoding and decoding. 115 Pages. Very Good

AUTHOR: Herbert S. Zim
PUBLISHER: Scholastic Book Service
ISBN:
YEAR: 1967
FORMAT: Softcover
EDITION: 13th Printing, December 1967