Khanna, D. R. <br/><br/>
Microbial ecology a study of  river ganga 

 - 1st 
 - New Delhi  Discovery Publishing House  2004 
 - 277p. 
<br/><br/> 13908 
<br/><br/><label>ISBN: </label>8171418503  575 
<br/><br/><label>Dewey Class. No.: </label>577.095 KHA-M