000 00270nam a2200121Ia 4500
999 _c6994
_d6994
020 _a0852266022
100 _aNagrath I J
245 _aControl Systems Engineering
260 _c1975
_bWILEY EASTERN LTD
_aNew Delhi
300 _axii+491
700 _aGopal M
942 _cBK