00326pam a2200109 a 4500020000500000041000500005082001500010100004300025245008000068260005700148300001100205  c  h  a658.4`0388  aSACHS David / KRONSTADT Babeheeauthor  aDiscovering Micro Softworks for the IBM Personal computerhTextual Document  bJohn wiley and sons , INC New York , Singaporec1989  ax, 278