Periphyton of freshwater ecosystems :  proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems, held in Vaxjo, Sweden, 14-17 September 1982 / 
edited by Robert G. Wetzel 
 - The Hague, Boston :  Junk,  1983 
 - 346 p. :  ill. ;  27 cm. 
 - Developments in hydrobiology  17 .
<br/><br/><label>ISBN: </label>906193768X 
<br/><br/><label>LCCN: </label>83-011358 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Periphyton--Congresses<br/>Freshwater ecology--Congresses