Delens A H R <br/><br/>
Principles of Market Research 
Delens A H R 
 - London  Crosby Lockwood & Son         1959 
 - 254p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:51b4, J9;1