DIWAN Romesh <br/><br/>
Productivity and technical change in food gains. 

 - New Delhi   Mc Graw Hill         1987 
 - xvi, 152p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(J3)ogF., M7/SC