Gopal, M. Control systems : principles and design / M. Gopal. - 4th ed. - New Delhi : Tata McGraw-Hill, c2012. - xviii, 878 p. : ill. ; 24 cm. ISBN: 0071333266 9780071333269 Subjects--Topical Terms: Automatic control. Dewey Class. No.: 629.8 / GOP 2012