International Potash Institute Worblaufen - Bern / Switzerland <br/><br/>
Potassium Research and Agricultural Production : Proceedings of The 10th congress of The International Potash Insitute held in june 1974 in Budapet / Hungry 

 - 1st 
 -  1975 
<br/><br/><label>Dewey Class. No.: </label>631.83IPI