Primitive worlds  : people lost in time 
/ National Geographic Society 
 - Washington, D.C.  : National Geographic Society  , 1973 
 - 211p.  : ill.  ; 26 cm.  
<br/><br/>Includes index  
<br/><br/><label>ISBN: </label>0870441272 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociedades primitivas<br/>Etnologías 
<br/><br/><label>LC Class. No.: </label>GN 400  / P75