00310nam a2200121Ia 4500008004100000041001200041082002000053100001200073245003300085260003700118300001400155650001900169231217s9999    xx            000 0 und d  aEnglish  a621.3811  GOP;1  aGopal M 0aModern control system theory  c1987bNew Delhi : Wiley Eastern,  axviii+644  aControl system