Ludewig, Charles Keech,  1906- <br/><br/>
Developments in inter-American transportation and communications, 1890-1940, 
by C. Keech Ludewig.  Fiftieth anniversary of the Pan American union, 1890--April 14--1940. 
 - Washington, D.C.,  Pan American Union  [1940] 
 - 4 numb. l.  28 cm. 
<br/><br/> Cover title.  At head of title: Pan American day, April 14.  Mimeographed. 
<br/><br/><label>LCCN: </label>pa 41000012  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation--Latin America.<br/>Communication and traffic--Latin America.<br/>Industries--Latin America.
<br/><br/><label>LC Class. No.: </label>HE230.A1  / L8 
<br/><br/><label>Dewey Class. No.: </label>380.98