00413nam a2200157Ia 4500008004100000020001400041084001500055100001600070245005000086250002000136260001900156260000900175260002200184300001400206500003500220180424s9999    xx            000 0 und d  a138543240  a510.78 D30  a"Downs, Ed" 0aStructured Systems Analysis and Design Method  a\\198800ENGGPSX  aPrentice Hall   b1988  cEnglewood Cliffs   aviii+215p  aincludes index and biblioraphy