00309nam a2200109Ia 4500008004100000100006000041245003900101260002100140260000900161300000600170650002300176221231s9999    xx            000 0 und d  aO'Brien, James A., Marakas, George M., Behl, Ramesh  A 0aIntroduction to Informaion systems  bTata McGraw-Hill  c2007  a9  aProject Management