TY  - BOOK
AU  - Biswas, Nripendra Nath,
TI  - Principles of carrier communication
SN  - 0210227117
AV  - TK6421 .B53 1969
U1  - 621.389 
PY  - 1969///
CY  - London
PB  - Asia Publishing House
KW  - Telephone, Carrier current
N1  - Includes bibliographical references and index
ER  -