000 00321nam a22001337a 4500
005 20210716150556.0
008 210716b ||||| |||| 00| 0 eng d
041 _aeng
100 _aI STE code 116
_924667
245 _aSystems dynamics and policy planning
260 _aDelhi
_bMHRD
_c1991
300 _a146
942 _cBK
999 _c62192
_d62192