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| 082 | _a001.64404 H196D | ||
| 100 | _aHarsall Fred | ||
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_aData communications and computer network and open systems _cHarsall Fred |
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_aNew Delhi _bPearson _c2003 |
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_aData communications and computer network and open systems _944800 |
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_c8051 _d8051 |
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