Collings , Gilbeart H <br/><br/>
Commercial fertilizers 

 - 5th 
 - New york  Mc Graw Hill  1955 
 - 617 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers
<br/><br/><label>Dewey Class. No.: </label>631.8  / C69C