TY  - BOOK
AU  - Biswas,Nripendra N.
TI  - Principles of telephony
SN  - 818527309X
U1  - 621.385 21
PY  - 1988/// [2001reprint]
CY  - India
PB  - Radiant Books.
KW  - Telephone, Automatic
N1  - Include Index
ER  -