00274nam a2200097Ia 4500008004100000082001400041100002200055245004000077260004600117300001300163190710s9999    xx            000 0 und d  a658 L576P  aLevin, Richardi I 0aPlanning and control with Pert /Cpm  aNew DelhibTata Mc Graw-Hill Publisc1977  avii, 179