Pyenson, Louis L. <br/><br/>
Elements of plant protection 

 - New York  John Wiley & Sons  1951 
 - x, 538 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural pests
<br/><br/><label>Dewey Class. No.: </label>632  / P992e 1951