Bulletin of the Pan American Union. 

 - Washington, D.C. :  The Union,  1910-1948. 
 - v. : 
<br/><br/><label>ISBN: </label>ISBNGOVTDOC045 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pan-Americanism.
<br/><br/><label>Dewey Class. No.: </label>320.5490973  / Bu