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| 008 | 251113s9999||||xx |||||||||||||| ||eng|| | ||
| 040 | _cnitttr | ||
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_a4.6 _bS29U |
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| 100 | _aShay, William A. | ||
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_aUnderstanding data communications and networks / _cShay, William A. |
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_c25219 _d25219 |
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