TY  - GEN
AU  - Bellamy, John,
TI  - Digital telephony
SN  - 0471080896
AV  - TK5103.7 
U1  - 621.385 
PY  - 1982///
CY  - New York
PB  - Wiley
KW  - Digital telephone systems
N1  - Includes index; Bibliography: p. 519-521
ER  -