The Philippines recommends for conservation farming in the sloping lands vol.I: contor farming. 

 - 2nd ed. 
 - Los Banos, Laguna :  PCARRD-DOST,  c2008. 
 - xi,98 p. :  ill. ;  23 cm. 
<br/><br/> (PCARRD Philippines Recommends Series No. 89. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contor farming.