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| 082 | _a621.384 G819 | ||
| 100 | _aGREGG,W.D | ||
| 245 | 0 | _aANALOG AND DIGITAL COMMUNICATIONS CONCEPTS SYSTEMS APPLICATIONS AND SERVICES IN | |
| 260 |
_aNEW YORK _bWiley _c1977 |
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| 300 | _a23X17 | ||
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_cBK _2DDC |
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