Mengel, K. Ernest, A.K. <br/><br/>
Principles of plant nutrition 
/by Konrad Mengel, Ernest A. Kirkby 
 - Bern  International Potash Institute  1978 
 - 593 pages 
<br/><br/><label>ISBN: </label>116653 
<br/><br/><label>Dewey Class. No.: </label>581.13  / MEN