Ken Simpson <br/><br/>
Fertilizer and manures 

 - London  Longman  1986 
 - 254p 
<br/><br/>Ken Simpson: Fertilizer and manures.  London.  Longman, 1986. 0-582-44747-X--(631.8SIM)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>0-582-44747-X 
<br/><br/><label>Dewey Class. No.: </label>631.8  / SIM