00409nam a2200145Ia 4500008004100000020001800041041000800059082001600067100005800083245004100141250000600182260003800188300000800226650002900234210716s2006    xx            000 0 und d  a9788131505496  aeng  a004.21 SHEG  aShelly, Gary B;Cashman, Thomas J;Rosenblatt, Harry J.  aSystems analysis and design methods.  a1  aNew DelhibCengage Learningc2006  a631  aSystem Analysis & Design