Shelly, Gary B. Systems analysis and Design methods / Gary B. Shelly. - 3rd ed. - New Delhi: Cengage learning, c2006. - 631p.: ill.;, figs.;, tables.; 22 cm. Includes index. Dept. of CSE ISBN: 9788131505496 Subjects--Topical Terms: Systems planning Dewey Class. No.: 004.21 / SHS