00305nam a2200121 a 450000500170000008200160001710000080003324500510004126000300009230000220012263000210014463000180016520251203092029.0  a004.21bLEE  aLee  aIntroducing systems analysis and design, Vol.1  aNew DelhibGalgotiac1995  a166p.b18 cm.cPB  aComputer Science  aSystems study