TY  - BOOK
AU  - Nagrath, I.J. Gopal, M 
TI  - Digital control and state variable methods 
SN  - 0-07-462134-3 
U1  - 629.8 GOP  
PY  - 1998///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - CONTROL SYSTEM
ER  -