Richards,W.O. <br/><br/>
Imms General Textbook of Entomology 

 - New York  Champman and Hall  1977 
<br/><br/><label>ISBN: </label>0-412-15220-7 
<br/><br/><label>LC Class. No.: </label>595.7/RIC 
<br/><br/><label>Dewey Class. No.: </label>595.7/RIC