Gustafson, A.F.  <br/><br/>
Handbooks of fertilizers: their sources, make-up, effects and use  (Book) 

 - 4th ed. 
 - London  Routledge and Kcgan Paul  1948 
 - 172p.  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers--Handbooks, manuals, etc.
<br/><br/><label>Universal Decimal Class. No.: </label>631.8 GUS  / 7946