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| 020 | _a81-85273-09-X | ||
| 082 |
_a621.385 _bBIS/P |
||
| 100 | 0 | _aBiswas, Nripendra N | |
| 245 | 0 | 0 | _aPrinciples of telephony |
| 260 |
_aBangalore _bRadiant Books _c2000 |
||
| 300 | _a138p. | ||
| 650 | 0 | _aTelecommunication- Telephony | |
| 942 | _cBK | ||
| 999 |
_c2366 _d2366 |
||