Singh, R.R. <br/><br/>
Land and biotic resources in Agriculture / 
by R.R. Singh 
 - 1st ed. 
 - New Delhi:  Pearl Books,  2013. 
 - 254p. 
<br/><br/><label>ISBN: </label>9789381575581 
<br/><br/><label>Dewey Class. No.: </label>J  / Q3