Fresh Water Biological Association of the British Empire. 

 - Ambleside :    Fresh Water Biological Association,    1939- 
 - v. :    ill. ;    21 cm. 
 - Annual 
 - Vol. 7 (Mar. 1939)- 
<br/><br/>  Latest issue consulted:  Vol. 58 (Mar. 1990). 
<br/><br/><label>Dewey Class. No.: </label>574.92906242