Ryan, William T. <br/><br/>
A guide to marketing 
<label>/ by </label> Ryan, William T. 
 - Homewood, Illinois  Learning Systems Co.  1971 
 - x,326p. 
<br/><br/>SR 
<br/><br/><label>ISBN: </label>0256025770 
<br/><br/><label>Dewey Class. No.: </label>658.8  / R