Travis William Penfield <br/><br/>
Theory of trade and protection 
Travis William Penfield 
 - Cambridge  Harvard University Press          1964 
 - x,296p  cm. 
 - Harvard economic studies.121 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Export
<br/><br/><label>Dewey Class. No.: </label>X:54, K4