000 00302nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a658.56
_bRIG
100 _aRiggs,JL
245 0 _aProduction systems planning analysis & control
260 _bJohn wiley&sons
_c1981
300 _a649
942 _2ddc
999 _c83320
_d83320