Thoman, Richard S. <br/><br/>
Free ports and foreign-trade zones. 

 -  Cornell Maritime Press  1956. 
 - 206 p. 
<br/><br/>Bibliography: p.192-197. 
<br/><br/><label>LCCN: </label>56010882  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Free ports and zones<br/>Puertos francos.