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| 005 | 20210906110521.0 | ||
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| 020 | _a0 335 06100 1 | ||
| 040 | _cTUM | ||
| 100 | _aOpen | ||
| 245 | _aTelecommunication Systems Unit 10 Case Study Of An Experime Ntal Telephone Exchange Technology: A Third Level Course | ||
| 250 | _a0 | ||
| 260 |
_aLondon _bOpen University Press _c1976 |
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| 942 |
_2lcc _cBK |
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