Ricker, William Edwin. <br/><br/>
Systematic studies in plecoptera 

 - Bloomington :  Indiana University,  1952 
 - 200 p.  : ilus. 
<br/><br/><label>LCCN: </label>48046 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plecóptera.
<br/><br/><label>Dewey Class. No.: </label>595.735  / R52