National geographic index :  1947-1976 (inclusive) / 

 - ed. 
 - Washington,D.C. :  National geographic society,  c1977. 
 - 451p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>870440934 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Indexes.<br/>Periodicals--Indexes.
<br/><br/><label>LC Class. No.: </label>AI1  / .N3