Findlay, Ronald. <br/><br/>
Trade and specialization. 

 - 1st Ed. 
 - Harmondsworth,  Penguin,  1970. 
 - 140 p. 
<br/><br/><label>ISBN: </label>0140801642 
<br/><br/><label>Dewey Class. No.: </label>382.018  / FIN