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| 245 | _aIEE conference publication No.56 : conference on measurement education | ||
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_aLondon _c1969 |
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| 300 | _a167 p., ill. | ||
| 440 | _aIEE Conference Publication | ||
| 440 | _aNo.56 | ||
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_a621.3(063) _bI6 |
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| 041 | _aEN | ||
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