Beker, Henry J.
Secure speech communications / Henry J. Beker, Fred C. Piper. - London : Academic Press, cop. 1985. - xi, [1], 267 s. : il. ; 24 cm.
0120847809
Kryptografia.
Secure speech communications / Henry J. Beker, Fred C. Piper. - London : Academic Press, cop. 1985. - xi, [1], 267 s. : il. ; 24 cm.
0120847809
Kryptografia.