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| 100 | 1 | _aPolcyn, Kenneth A. | |
| 245 | 1 | 3 |
_aAn educator's guide to communication satellite technology / _cby Kenneth A. Polcyn |
| 260 |
_aWashington : _bInformation Center on Instructional Technology Academy, _c1973 |
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_a99 p. : _bill. ; _c30 cm. |
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| 650 | 0 | _aTelevision in education | |
| 650 | 0 | _aArtificial satellites in telecommunication | |
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| 991 | _aF S Kemasyarakatan dan Kemanusiaan | ||
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