Wallis, R. L.  1902- <br/><br/>
Ecological studies on the potato psyllid as a pest of potatoes / 
by R.L. Wallis. 
 - Washington :  U.S. Dept. of Agriculture,  1955. 
 - 24 p. :  ill., maps ;  23 cm. 
 - Technical bulletin / United States Department of Agriculture ;  no. 1107 .
 - Technical bulletin (United States. Department of Agriculture) ;  no.  1107. .
<br/><br/> Caption title. 
<br/><br/>Literature cited: p. [25] 
<br/><br/><label>LCCN: </label>agr55000129  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Jumping plant-lice.<br/>Potatoes--Diseases and pests.
<br/><br/><label>LC Class. No.: </label>S21  / .A72 no. 1107 
<br/><br/><label>National Agricultural Library Call No.: </label>1  / Ag84Te no.1107