00274nam a2200121Ia 4500100001300000250000600013654001200019245004400031260003900075082001800114300000800132546001200140  aGopal/M   a2  acontrol  aControl system  Principles  and  design  bTata Mc Graw hillaNew Delhic1997  a629.8312bGOP  a999  aENGLISH