Willoughby, L G <br/><br/>
Freshwater Biology 

 - London  LOGMAN  1977 
 - 167p. 
<br/><br/><label>Subjects--Uniform Titles: </label>--GENERAL STACK
<br/><br/><label>Subjects--Topical Terms: </label><br/>NATURAL SCIENCE& MATHEMATICS--GEOLOGY,HYDROLOGY &METEROLOGYZoology--EARTH SIENCE
<br/><br/><label>Dewey Class. No.: </label>551.48  / WIL-F