TY - BOOK AU - Beker,Henry AU - Piper,F.C. TI - Secure speech communications SN - 0120847809 (alk. paper) AV - TK5102.5 .B354 1985 U1 - 621.38 19 PY - 1985/// CY - London, Orlando [Fla.] PB - Academic Press KW - Scrambling systems (Telecommunication) N1 - Includes index; Bibliography: p. 259-262 ER -