The Ecology of soil bacteria:  an international symposium, 
edited by T. R. G. Gray and D. Parkinson. 
 - Toronto :  University of Toronto Press,  1968. 
 - xv, 681 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil microbiology--Congresses.<br/>Bacteria--Ecology--Congresses.