TY  - BOOK
AU  - Nagrath, I.J. Gopal, M 
TI  - Control systems: principles and design 
SN  - 0-07-048289-6 
U1  - 629.8 NAG  
PY  - 2001///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - CONTROL SYSTEM
ER  -