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90 pages • first pub 1976 (editions)
ISBN/UID: 9780140313673
Format: Paperback
Language: English
Publisher: Not specified
Publication date: Not specified
medium-paced
Description
Explains and illustrates codes which can be used to send secret messages or as brainteasers.
Community Reviews
Content Warnings
90 pages • first pub 1976 (editions)
ISBN/UID: 9780140313673
Format: Paperback
Language: English
Publisher: Not specified
Publication date: Not specified
medium-paced
Description
Explains and illustrates codes which can be used to send secret messages or as brainteasers.
Community Reviews
Content Warnings