Potassium and the quality of agricultural products/ 
proceedings o f the 8th congress of the Interantional Potash Institue, Brussels 1966. 
 - Berne ,  1968. 
 - 597p. :  ill., plates ;  23cm. 
<br/><br/> Cover title : Potassium, potasio, kalium symposium, 1966.  Text in English, French or German. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Potassium fertilisers--Congresses.
<br/><br/><label>Dewey Class. No.: </label>631.83 INT