Heady Earl O <br/><br/>
Agricultural production functions 

 - Ludhiana  Kalyani Publishers        1961 
 - viii,667p  cm. 
<br/><br/><label>Standard No.: </label>36184 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>X9(J):2, K1