Diagnosis & improvement of saline & alkali soils / 
edited by L. A. Richards. 
 - Washington, DC :  United States Department of Agriculture,  1969. 
 - iv, 160 p. :  ill. ;  26 cm. 
 - Agriculture Handbook No. 60 .
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science.<br/>Soils--Alkanity--Diagnosis.