Keys to the case-brearing caddis lavae of Britain and Ireland. 

 - Ambleside :    Fresh Water Biological Association,    2003- 
 - v. :    ill. ;    21 cm. 
 - No. 61 (2003)- 
<br/><br/><label>ISSN: </label>0367-1887 
<br/><br/><label>Dewey Class. No.: </label>574.929