Tinbergen, J. <br/><br/>
Observations on the planned provision of nitrogen fertilizer for the world / 
J. Tinbergen, L. H. Klaassen & E. H. Mulder 
 - Leiden :  H.E. Stenfert Kroese N.V. ,  1956 
 - 45p. :  ill. ;  22 cm.  
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>631.8  / TIN