Helfer, Jacques R. <br/><br/>
The Grasshoppers, Cockroaches and Their Allies 
By Jacques R. Helfer 
 - Dubuque, Iowa  Wm. C. Brown Company Publishers  1972 
 - vii, 359 pages, 22 cm. 
<br/><br/> includes appendix, index, and glossary 
<br/><br/><label>ISBN: </label>0-697-04825-X 
<br/><br/><label>Dewey Class. No.: </label>595.726 H36