Helfer, Jacques R. <br/><br/>
The grasshoppers cockroaches and their allies  / 
Jacques R. Helfer 
 - 352 p. : il. 
<br/><br/><label>LCCN: </label>TIPO-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENTOMOLOGIA
<br/><br/><label>Dewey Class. No.: </label>595.726  / H474g