000 00580nam a2200169Ia 45e0
008 181001s1986 xx 000 0 und d
100 _aHira &
245 0 _aOperation Research
260 _aNewDelhi
_bS.Chand & com.
_c1986
300 _a918
700 _a2nd
700 _aGupta
942 _2ddc
_cBK
999 _c3556
_d3556