Williams, John Irving <br/><br/>
Micro organisms 

 - 2nd ed. 
 -  Bell & Hyman,  1982. 
<br/><br/> 176P : ILL 25CM. 
<br/><br/><label>ISBN: </label>0713513217 
<br/><br/><label>Dewey Class. No.: </label>576