Gray, T. R. G.  1937- <br/><br/>
Soil micro-organisms / 
T. R. G. Gray and S. T. Williams. 
 - London :  Longman,  1975. 
 - viii, 240 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0582441609 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil microbiology.