TY  - BOOK
AU  - Richards,D.L.
TI  - Telecommunication by speech: the transmission performance of telephone networks
SN  - 040870344X
AV  - TK6161 .R52 1973b
U1  - 621.385 RIC 23
PY  - 1973///
CY  - London
PB  - Butterworths
KW  - Telephone
N1  - Bibliography: p. 529-577
ER  -