Lester A. Swan <br/><br/>
Beneficial insects 

 - New York  Harper and Row  1964 
 - 429p 
<br/><br/>Lester A. Swan: Beneficial insects.  New York.  Harper and Row, 1964.--(595.706SWA)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>595.706  / SWA