00285nam a2200109 a 450000500170000008200150001710000210003224500440005326000390009730000090013663000300014520251202164309.0  a519.7bMEE  aMeeseke,Paul Van  aMathematical programs activity analysis  aNew York:bAmerican Elsevierc1974  a309p  aMathematical optimization