Yonny, Robert J. V. <br/><br/>
International training course in soil and plant analysis :  report on studies undertaken during the six-month course in soil and plant analysis / 
by Robert J. V. Yonny. 
 - Amsterdam, The Netherlands :  Royal Tropical Institute,  1986. 
 - 19 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>plants--Analysis.<br/>Soils--Analysis.