| 000 | 00344nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 210210b1980 xxu||||| |||| 00| 0 eng d | ||
| 082 | _a621.385 JAIP | ||
| 100 | _aJAIN (A K). | ||
| 245 | _aPrinciples of telephony. | ||
| 260 |
_aDelhi _bNew heights _c1980 |
||
| 300 | _aiv,260 | ||
| 650 | _aTelephony | ||
| 690 | _aTelephony | ||
| 906 | _a034309 | ||
| 999 |
_c85158 _d85158 |
||