Codes, ciphers and secret writing.
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Word Count
19,250 words, Guess
Page Count
77 pages
Identifiers
- ISBN-100600317633
- ISBN-139780600317630
- LibraryThing1779185
- Library of Congress Control Number74186001
- OCLC Control Number1175102
and 1 more
- Open LibraryOL5113329M
Classifications
- DDC001.54/36
- LCCZ103.3 .B4
Description
Describes various types of codes and ciphers giving examples of their use.
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