00273nam a2200097Ia 450000500170000000800410001705000150005810000190007324500490009226000340014120251229085437.0251229s9999    xx            000 0 und d  aHC 517 .P4  aPerrett, Heli. 0aHuman factors in project work.cHeli Perrett  aWashingtonb D.Cc World Bank