000 00229nam a2200097Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aWAGAER( M.M)
245 0 _aPRINCIPAL OF OPERATIER RESARCH
260 _bPHI
942 _2ddc
_cBTECH
999 _c7064
_d7064