000 00259nam a2200121Ia 4500
082 _a003 NAG/S
100 _aNagrath IJ
245 _aSystems Modelling and Analysis
260 _c1982
_bTMH
_aNew Delhi
300 _axii+647
700 _aGopal M
942 _cBK
999 _c14431
_d14431