Krypton, Constantine <br/><br/>
Northern sea route   and the economy of the Soviet North 

 - London  methuen & Co.  1956 
 - ix, 219p 
<br/><br/><label>Subjects--Index Terms: </label>Northern sea route 
<br/><br/><label>Dewey Class. No.: </label>335.43  / KRY