Cook, William Carmichael,  1895-1967. <br/><br/>
Ecology of the pea aphid in the Blue Mountain area of eastern Washington and Oregon 

 - Washington]  Agricultural Research Service, U.S. Dept. of Agriculture  [1963] 
 - 48 p.  illus., maps.  24 cm. 
 - Technical bulletin (United States. Department of Agriculture) ;  no. 1287. .
<br/><br/><label>LCCN: </label>agr63000445  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pea aphid.
<br/><br/><label>LC Class. No.: </label>S21  / .A72 no. 1287