Harwood, P. B. (1970). Control of electric motors ed by Ralph A Millermaster. (4th ed.).
Παραπομπή Chicago StyleHarwood, Paisley Beach. Control of Electric Motors Ed by Ralph A Millermaster. 4th ed. 1970.
Παραπομπή MLAHarwood, Paisley Beach. Control of Electric Motors Ed by Ralph A Millermaster. 4th ed. 1970.
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