Allen, Robert Y.  <br/><br/>
Selling dynamics / 
Robert Y. Allen, Robert F. Spohn, I. Herbert Wilson. 
 - New York:   McGraw-Hill,   1984. 
 - 487 pages :    illustrations ;    24 cm. 
<br/><br/><label>ISBN: </label>0070011613 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Selling.