Gregersen H M <br/><br/>
Gidelines For Economic Appraisal Of Water Shed Management Projects 

 -  Rome : Fao 1987. 
 - 144 
 - Fao Plant Production And Protection Paer No. 76 .
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>925102555X(Pbk)