United nations convention to combat desertification : in those countries experiencing serious drought and / or desertification, particularly in Africa 

 - Switzerland  T.C. Ministry of Environment  -0001-11-29 
 - Sayfa sayısı: 71 s. Boyu: 21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BİRLEŞMİŞ MİLLETLER