| 000 | 00357nam a2200169Ia 4500 | ||
|---|---|---|---|
| 999 |
_c1177 _d1177 |
||
| 020 | _a- | ||
| 100 |
_aBiswas N N _93779 |
||
| 245 | 0 | _aPrinciples of Telephony | |
| 250 | _a1 | ||
| 264 |
_bRadiant Books _c1970 |
||
| 300 | _a138 | ||
| 490 | _a- | ||
| 500 | _a- | ||
| 546 | _aENG | ||
| 650 |
_aElectronics and Communication, Telephony _944667 |
||
| 942 | _cBK | ||