National geographic Vol. 199, no.3 Mar 2001 Extreme Africa: Trekking through the green abyss 

 - Washington, D.C.  National Geographic Society.  [date of publication not identified] 
 - v.  26cm 
<br/><br/> monthly 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography -- Periodicals.