Gilbeart H. Collings <br/><br/>
Commercial fertilizers : Their sources and use. Ed 4 

 - 4th Ed 
 - Philadelphia  Blakiston Co  1947 
 - 522p 
<br/><br/>Gilbeart H. Collings: Commercial fertilizers : Their sources and use. Ed 4.  (4th Ed)  Philadelphia.  Blakiston Co, 1947.--(631.8COL)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>631.8  / COL