Keys to palaearctic fauna :  Thorp and Covich's fresh water invertebrates / 
edited by D. Christopher Rogers, Kansas Biological Survey and The Biodiversity Institute, University of Kansas, Lawrence, KS, USA and James H. Thorp, Kansas Biological Survey and Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA. 
 - 4th edition. 
 - London :  Elsevier Inc.,  2019. 
 - xxiii, 920 pages :  illustrations. 
 -   IV .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780123850249 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fresh water invertebrates--North America
<br/><br/><label>LC Class. No.: </label>QL 151   / THO 2019