00310nam a2200133Ia 4500008004100000020001800041082001000059082001000069100002400079245002800103260001300131260002300144260000900167230118s9999||||xx |||||||||||||| ||und||  a81-7663-911-7  a651.7  bBAL/B  ambbalasubrahmanian 0abusiness communications  anewdelhi  bkalyani publishers  c1990