Elgerd, Olle Ingemar Electric energy systems theory : an introduction / Olle Ingemar Elgerd - 2nd ed - India Tata McGraw-Hill 1982 - 533 p. ISBN: 9780070992863 Subjects--Topical Terms: ļ¾ Electric engineeringļ¾ Dewey Class. No.: 621.3 ELG-O