621.31042 GUP 17062
Gupta, J. B. Electrical machines-1: D. C. machines : D.C machines, A.C machines & polyphase circuits / by J. B. Gupta. - 7th rep. ed.. - Ludhiana : Katson Publishing house, 1983 viii, 416p.:ill. ;22cm * Direct current motors Electrical machine
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