Richards, B. N. <br/><br/>
Introduction to the soil ecosystem / 
B.N. Richards. 
 - Harlow, Essex :  Longman,  1974. 
 - x, 266 p. :  ill. 
<br/><br/> A Longman text. 
<br/><br/><label>ISBN: </label>0582441307 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil ecology.<br/>Microbiology.<br/>Soil microbiology.