00275nam a2200097 a 450000500170000008200200001710000180003724500580005526000420011330000220015520251203091607.0  a658.05,bD, var  aVarsegi, Alex  aPractical business systems implementation: a DP guide  aNew YorkbVan Nostrand Reinholdc1988  axiv, 312p, 22 cm.