Gray, T. R. G. <br/><br/>
Soil micro-organisms 
T. R. G. Gray and S. T. Williams 
 - London  Longman  1971 
 - vii,240p.; 22cm.- 
 - University review in botany;2 .
<br/><br/><label>Dewey Class. No.: </label>631.46  / GRA