Elgerd, Olle I. Electric energy systems theory : an introduction / Olle I. Elgerd. - 2nd ed. - New Delhi : Tata McGraw-Hill Publishing Company Limited, 1982 - xviii, 533 p. ISBN: 007099286X Subjects--Topical Terms: Electrical engineeringElectric power systems Dewey Class. No.: 621.3 / ELG