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Comparative accuracy of three-phase, four-wire metering methods,: By D. T. Canfield (Bulletin no. 13, Engineering extension department)
Author: D T Canfield   ISBN: B00087EDMQ   /   Unknown Binding Publisher: Purdue University   /   1925
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The phonoviewer as an EFNEP teaching method: Summary report phase I
Author: Jane Voichick   ISBN: B0006Y9V8M   /   Unknown Binding Publisher: U.S. Dept. of Agriculture, Federal Extension Service?]   /   1974
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