Betten, Cornelius,  1877- <br/><br/>
The Francis Walker types of Trichoptera in the British museum, 
re-described and figured by Cornelius Betten ... and Martin E. Mosely. 
 - London,  Printed by order of the Trustees of the British museum,  1940. 
 - ix, 248 p.  front. (port.) illus.  26 cm. 
<br/><br/> At head of title: British museum (Natural history) 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>agr41000229  
<br/><br/><label>Subjects--Personal Names: </label><br/>Walker, Francis, 1809-1874. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Caddisflies.
<br/><br/><label>LC Class. No.: </label>QL517.1  / .B42