00269nam a2200121Ia 4500100002200000250000600022654001100028245003100039260004300070082001400113300000800127546001200135  awetherbe/James C   a3  asystem  aSystem analysis and design  bGalgotia PublicationsaNew Delhic1990  a1.61bWET  a395  aENGLISH