000 00320nam a2200121Ia 4500
008 221001s1980 xx 000 0 eng d
082 _a003 GUP
100 _aGupta, P. K.
245 0 _aOperations research and statistical analysis
260 _aNew Delhi
_bSultan Chand
_c1980
300 _axiv, 428p.
942 _2ddc
_cREF
999 _c28091
_d28091