00360nam a2200133Ia 4500008004100000020001500041041000800056082001600064245004500080250000600125260006000131300000600191650002900197210716s1994    xx            000 0 und d  a8172636512  aeng  a004.21 IGNO  aElements of systems analysis and design.  a1  aNew DelhibIndira Gandhi National Open Universityc1994  a-  aSystem Analysis & Design