Farmsize ,productivity and returns to scale 

 - Delhi  Delhi school of Economics         1969 
 - Various pagination  cm. 
<br/><br/> Working paper no.59; The document contains various articles 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(J):8.2.N69, K9