Sivakumar, M. V. K. <br/><br/>
Drought spells and drought frequencies in west Africa 

 - Patancheru, India :  ICRISAT,  1991 
 - 181 p.  ; gráfs. 
 - Research bulletin  ; 13 .
 - Research bulletin  ; 13 .
<br/><br/><label>LCCN: </label>2982 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Africa--Africa.<br/>Sequías.
<br/><br/><label>Dewey Class. No.: </label>632.12  / S52