00310nam a2200133Ia 4500001000500000005001700005008004100022020001500063082001400078100002000092245003200112250001200144260002000156461820261006003809.0120911s9999    xx            000 0 und d  a0877096317  a005.1 SHE  a Shelly,gary b   a System analysis and design  a2nd ed.  a Boyd & fraser