Davidson, Ralph H. (Ralph Howard), 1908- <br/><br/>
Insect pests of farm, garden, and orchard / 
Ralph H. Davidson, William F. Lyon. 
 - 7th ed. 
 - New York :  Wiley,  1979. 
 - 596 p. :  ill., port.,  23 cm. 
<br/><br/> Fourth-6th ed. by L. M. Peairs and R. H. Davidson. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0471035386 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Insects, Injurious and beneficial.<br/>Insects, Injurious and beneficial--North America.<br/>Insect control.