Murphy, Josette. <br/><br/>
Farmers' estimations as a source of production data :  methodological guidelines for cereals in Africa/ 

 - Washington D. C :   The world bank,   1991. 
 - 71p;  ill. 
<br/><br/><label>ISBN: </label>0821317059 
<br/><br/><label>Dewey Class. No.: </label>338.1  / MUR.N1