| 000 | 00400nam a2200169Ia 4500 | ||
|---|---|---|---|
| 008 | 220421s9999||||xx |||||||||||||| ||und|| | ||
| 020 |
_c450 _a0074634976 |
||
| 040 | _aET | ||
| 082 | _a384 GUP-T | ||
| 100 |
_aGupta, Niraj K _914411 |
||
| 245 | 4 | _aThe Business telecommunication | |
| 250 | _a1st | ||
| 260 |
_bTata McGraw Hill _aDelhi _c2000 |
||
| 300 | _a506p. | ||
| 500 | _a20246 | ||
| 942 | _cBK | ||
| 999 |
_c26461 _d26461 |
||