Book Description1924 Other volumes in this set include ISBN number(s): 0766161730, 0766161757 Volume 2 of 3 These volumes contain the Sheldon Course on successful selling - what, who, why, how They represent a code of practice based upon an organization of natural laws constituting the science of constructive salesmanship The Sheldon School оетьп was the pioneer in this field of human helpfulness It braved the perils of an unknown and unexplored realm and blazed the way This volume contains the following lessons: reliability development; endurance development; action development; finding the customer.  Перед вами2003 г ISBN 0766161749.