Co-operative research on input/output relationships in use of fertilizers in crop production / 
by Olle Johnsson... [et al.] 
 - [Uppsala] :  Organisation for Economic Co-operation and Development,  [n.d.] 
 - 99 p. ;  24 cm. 
<br/><br/><label>ISBN: </label> OBS 10.60 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sulfur in agriculture
<br/><br/><label>Dewey Class. No.: </label>631.88