
Describes various types of codes and ciphers, including the genetic code, and how useful they are to spies.
Publisher:
New York : F. Watts, 1998
Edition:
1st American ed
Series:
ISBN:
9780531153468
0531153460
9780531144756
0531144755
0531153460
9780531144756
0531144755
Branch Call Number:
YS 652.8 WEL
Characteristics:
32 p. : ill. (some col.) ; 28 cm
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