Baum, Emanuel L. <br/><br/>
Economic and technical analysis of fertilizer innovation and resource use 

 - Ames, Iowa :  State College,  1957 
 - 393 p.  : ilus. 
<br/><br/><label>LCCN: </label>12843 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abonos.<br/>Agricultura--Aspectos económicos.<br/>Fertilizantes.
<br/><br/><label>Dewey Class. No.: </label>631.8  / B38