Wentz, Walter B. <br/><br/>
Marketing research  management, methods, and cases 
Walter B. Wentz. 
 - 2nd ed. 
 - New York  Harper & Row  1979. 
 - 770p. :  ill.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marketing research.<br/>Marketing research--Statistical methods.<br/>Marketing research--Case studies.