Richards, B. N.,  1928- <br/><br/>
Introduction to the soil ecosystem / 
B. N. Richards. 
 - New York :  Longman,  1974. 
 - x, 266 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0582441307 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil ecology.