00333nam a2200121 a 450000500170000002000150001708200220003210000280005424500520008226000350013430000200016970000220018920251202164247.0  a0139409416  a001.6424,bD, Has  aHastings, Nicholas A.J.  aVax Basic for Business: A screen based approach  aNew DelhibPrentice-Hallc1984  ax,234p.c24 cm.  aWillis, Robert J.