Mehta V.K. creator Mehta Rohit text New Delhi S.Chand&Company pvt. Ltd. 2016 1980 monographic 777 Principles Of Electronics 621.381 9788121924504 https://www.amazon.in/s?k=9788121924504&i=stripbooks&ref=nb_sb_noss https://www.amazon.in/s?k=9788121924504&i=stripbooks&ref=nb_sb_noss