John, N. A. and Vyas, V. S. <br/><br/>
Conditions of stability and growth in arid agriculture   

 - Vallabh Vidyanagar  Sardar Patel University  1969 
 - xvi, 127p. 
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>338.109544  / J63.CS