Batjes, N. H. <br/><br/>
A global data set of soil pH properties / 
N.H. Batjes. 
 - Wageningen, The Netherlands :  International Soil Reference and Information Centre,  1995. 
 - iv, 28 p. : maps. 
 - ISRIC technical paper ; 27 .
<br/><br/><label>ISBN: </label>9066720603 
<br/><br/><label>ISSN: </label>090233792 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil acidity--Data processing.<br/>Hydrogen-ion concerntration--Data processing.