| 000 | 00456nam a22001697a 4500 | ||
|---|---|---|---|
| 999 |
_c66148 _d66148 |
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| 005 | 20210111102429.0 | ||
| 008 | 210111b ||||| |||| 00| 0 eng d | ||
| 082 | _a621.385 D229I | ||
| 100 | _aDas, P N | ||
| 245 | _aIntroduction to Manual Telephony | ||
| 260 |
_aCalcutta _bModern Book Agency Privete Ltd _c1978 |
||
| 300 | _ap.149 | ||
| 650 | _bInter Communication Systems | ||
| 650 | _bTelephone Relays | ||
| 650 | _bAutomatic Working | ||
| 942 | _cSW | ||