Baum, E. L. <br/><br/>
Methodological procedures in the economic analysis of fertiliser use data / 
edited by E. L. Baum, O. Heady and John Blackmore. 
 - Ames, Iowa :  Iowa State College Press ,  1956. 
 - xx, 218p. :  ill. ;  24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures--Research.
<br/><br/><label>Dewey Class. No.: </label>631.88