Prelimminary report / 
prepared for the International Geographical Congress, Washington 1952. 
 - New York :  The Union,  1953?. 
 - 48 p. :  ill., maps, tables ;  31 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Harbors.<br/>Geography, Economics.
<br/><br/><label>Dewey Class. No.: </label>PF 91 I57