The lake chad conventional basin :  a diagnostic sty of environmental degradation. 

 - The Lake Chad Basic Commission,  1990. 
 - xiii, 177 p. :  ill. maps ;  30 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental degradation--Chad.<br/>Chad, Lake--Environmental conditions.<br/>Watersheds--Chad.<br/>Watersheds management--Chad.