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:  Koninklijk Instituut voor de Tropen,  1986. 
 - ii, 20 leaves. 
<br/><br/> On title page: National Analysis Laboratory, PNG University of Technology. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Analysis.<br/>Soils--Analysis.