Johansson, Olle <br/><br/>
Co-operative research on input/output relationships in use of fertilizers in crop production 
by Olle Johansson...[et.al] 
 - Paris  Organisation For Economic Co-Operation and Development  1960 
 - 99+p. 
<br/><br/><label>Dewey Class. No.: </label>Z212084 Or3