Microbiology of water and air vol - II,III,IV & V 

 - 1st 
 - Sri Lanka<br/>  The Open University  1998 
 - Various pages. 
<br/><br/><label>ISBN: </label>9552307058 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life Sciences
<br/><br/><label>Dewey Class. No.: </label>576  / MIC