Macan, T. T. <br/><br/>
Fresh water ecology/2nd ed. 

 - 2nd ed. 
 - London  Longman Group  1974 
<br/><br/><label>ISBN: </label>0-582 44624 4 
<br/><br/><label>Dewey Class. No.: </label>574.52632  / L4;1