Swan, Lester, <br/><br/>
Beneficial insects :  nature's alternatives to chemical insecticides : animal predation, parasitism, disease organisms / 
Lester Swan. 
 - 429 páginas :  ilustraciones. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENTOMOLOGIA.<br/>INSECTOS UTILES Y PERJUDICIALES.
<br/><br/><label>Dewey Class. No.: </label>595.7