Codes and ciphers /
D'Agapeyeff, Alexander.
Codes and ciphers / Alexander d'Agapeyeff - Rev. and reset - London : G. Cumberlege, Oxford university press, 1952. - 149 p. : ill. ; 19 cm - 1 Compass books ; .
Bibliography: p. 145-146. and index.
Ciphers
Cryptography
652.8 / DAC 1952
Codes and ciphers / Alexander d'Agapeyeff - Rev. and reset - London : G. Cumberlege, Oxford university press, 1952. - 149 p. : ill. ; 19 cm - 1 Compass books ; .
Bibliography: p. 145-146. and index.
Ciphers
Cryptography
652.8 / DAC 1952