Research reports - National Geographic Society. 

 - Washington, DC :    National Geographic Society,    1861- 
 - v. :    ill. ;    25 cm. 
 - Biennual 
 - 1890- 
<br/><br/>  Latest issue consulted: Vol. 13 (1971-1972). 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Geography -- Periodicals.
<br/><br/><label>Dewey Class. No.: </label>910.6273