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