National Geographic index, 1947-1976. 

 - Washington, D.C. (17th & M Sts., N.W., Washington 20036) :  National Geographic Society,  c1983. 
 - 451p. ;   24 cm. 
<br/><br/><label>ISBN: </label>870440934 
<br/><br/><label>LCCN: </label>83192446  
<br/><br/><label>LC Class. No.: </label>IN PROCESS 
<br/><br/><label>Dewey Class. No.: </label>575.21 NAT 1977