Claasen, Peter Walter <br/><br/>
A Catalogue of the plecoptera of the world/ 
Peter Walter Claasen 
 - 235pages  24cm 
 - Cornell University Agricultural Experiment Station memoir no. 232, June 1940 .
<br/><br/> Acc. No. 05249 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diptera--Catalogues<br/>Flies--Catalogues