Collings, Gilbeart Hooper. <br/><br/>
Commercial fertilizers  : their sources and use 

 - 5 ed. 
 - New York :  McGraw-Hill,  1955 
 - 617 p.  : ilus. 
<br/><br/><label>LCCN: </label>22343 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizantes y abonos.
<br/><br/><label>Dewey Class. No.: </label>631.8  / C65 1955