Microbiology and soil fertility :  papers presented at the twenty-fifth annual biology colloqium / 
edited by C. M. Gilmour and O. N. Allen. 
 - Corvallis :  Oregon State University Press,  1965. 
 - 164 p. :  ill. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil microbiology.