4 1 10 I J Nagrath Primary Author D P Kothari Primary Author Kothari, D P Primary Author Nagrath, I J Primary Author mixed material 9780071077750 New Delhi Tata Mc Graw-Hill 2011 030003686.jpg.jpg Nagrath, I.J. and Gopal, M. Primary Author mixed material New Delhi McGraw-Hill 1984 010006045.jpg Nagrath, I.J. Primary Author Kothari, D.P. Primary Author mixed material New Delhi Tata Mc Graw-Hill 1980 030002368.jpg.jpg Nagrath, I.J. Additional Author Gopal, M Additional Author mixed material New Delhi ITN Malang 1982