000 00342nam a2200157Ia 4500
008 190201s9999 xx 000 0 und d
020 _a9.78E+12
082 _a621
082 _b381011
100 _a"Nagrath, I J"
245 0 _aSystems Modelling And An
260 _aNew Delhi
260 _bTMH
260 _c1982
300 _a"XII, 647"
999 _c46659
_d46659