Das Gupta, D. K. <br/><br/>
Higher productivity in agriculture  : proceedings of the National Symposium on Approach to Higher Productivity of Crops... 

 - New Delhi :  Oxford & IBH,  1980 
 - 177 p.  ; gráfs. ; tablas 
<br/><br/><label>LCCN: </label>70875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cultivos--Mejoramiento.<br/>Cultivos--Rendimiento.
<br/><br/><label>Dewey Class. No.: </label>633  / D3