00360nam a2200133 a 450000500170000002000150001708200160003210000150004824500750006326000350013830000230017370000170019670000130021320251203091527.0  a0138543240  a004.21bDOW  aDowns, ED.  aStructured systems analysis and design method: application and context  aNew York: Prentice: Hallc1987  aviii,215p.c22 cm.  aClare, Peter  aCoe, Ian