Potash and tropical agriculture 

 - Holland :    Internationale handeimaatschappij voor meststoffen N.V,    1958- 
 - v. :    ill. ;    28 cm. 
 - Quarterly 
<br/><br/>  Latest issue consulted: Vol. 5, no. 4 (Oct. 1962) 
<br/><br/><label>Dewey Class. No.: </label>631.8305