Simpson, Ken. <br/><br/>
Fertilizers and manures / 
K. Simpson. 
 - London :  Longman,  1986. 
 - 254 p. :  ill. ;  22 cm. 
 - Longman handbooks in agriculture .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers.<br/>Manures.
<br/><br/><label>Dewey Class. No.: </label>631.8  / 1