000 00247nam a22001217a 4500
040 _cSY
082 _a519 HAD 1975 C176
100 _aG.HADLEY
245 _aLinear programming
260 _aAmerica
_bG.HADLEY
_c1975
300 _a519
942 _cEK
999 _c11138
_d11138