NARTOV, P. S. <br/><br/>
Disk Soil-Working Implements, 

 - Faridabad,  Printsman Press,  1972 
 - 148p. 
<br/><br/><label>ISBN: </label>90-6191-443-4 
<br/><br/><label>Dewey Class. No.: </label>631.51