Claassen, Peter Walter,  1886- <br/><br/>
Plecoptera nymphs of America (north of Mexico) /  
by Peter W. Claassen ... 
 - Springfield, Ill.,  Baltimore, Md.,  Pub. for the Thomas Say Foundation by C. C. Thomas,  1931. 
 - 3 p. l., 199 p., 1 l. incl. illus., 35 pl.  col. front.  24 cm. 
 - Thomas Say Foundation. [Publications] vol. III .
<br/><br/> Descriptive letterpress on versos facing the plates. 
<br/><br/><label>LCCN: </label>32010183  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stoneflies.
<br/><br/><label>LC Class. No.: </label>QL513.P4  / C6 
<br/><br/><label>Dewey Class. No.: </label>595.735