Codes, ciphers and secret language
Wrixon, Fred B.1989
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Main title:
Codes, ciphers and secret language / Fred B. Wrixon.
Author:
Imprint:
London : Harrap, 1989.
Collation:
266p. : ill. ; 25cm.
Notes:
Bibliography: p265-266.
ISBN:
9780245548802
Dewey class:
652.8
Language:
English
Subject:
BRN:
117126
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