Paithankar, Y.G. creator Bhide, S.R. text New Delhi PHI Learning 2010 2nd edition. monographic xiv,366 p. ; Electric power systems--Protection Electric power systems 621.3PAI 8120341236 (paperback) 9788120341234 (paperback) http://www.amazon.com/exec/obidos/ASIN/8120341236/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/8120341236/chopaconline-20