Singh, P. Ravindra creator text New Delhi PHI Learning 2009 monographic XVI,327p. Protective Relays Electric circuit-breakers Electric power systems--Mathematical models Electric power systems--Protection Electric power systems Electric power production 621.317SIN 8120336607 (paperback) 9788120336605 (paperback) http://www.amazon.com/exec/obidos/ASIN/8120336607/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/8120336607/chopaconline-20