Improving farm production in tropical and sub-tropical regions of limited rainfall 

 - Washington :  La Agencia,  1971 
 - 25 p. 
 - Agriculture technology for developing countries. Technical series bulletin  ; 4 .
 - Agriculture technology for developing countries. Technical series bulletin  ; 4 .
<br/><br/><label>LCCN: </label>70679 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Trópicos.<br/>Trópicos--Agricultura.