000 00288nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aP K Gupta/ Manmohan
245 0 _aOperations research and statistical analysis
250 _a2nd
260 _aNew Delhi
_bSultan Chand
_c1984
942 _cBK
999 _c4737
_d4737