ISBN 0-8493-8578-4 Thomas P. Hughes, Networks of Power : Electrification in Western Society 1880-1930, The Johns Hopkins University Press, Baltimore 1983 ISBN 0-8018-2873-2, excellent overview of development during the first 50 years of commercial electric power Westinghouse Electric Corporation, '' 'Electric power transmission patents ; Tesla polyphase system' '.
ISBN 0-8493-8578-4 Westinghouse Electric Corporation, "" Electric power transmission patents ; Tesla polyphase system "".