Spy codes and ciphers
por
Sobre o livro
"Discusses different methods of secret communications used by spies, such as Morse code, the Enigma machine, the Najavo language, and digital steganography, and includes career information"--Provided by publisher.
Detalhes
OpenLibrary
OL15071063W
Fonte
OpenLibrary
O Que a Galera Achou
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