Wildermuth, V. L. <br/><br/>
Biology and control of the corn leaf aphid with special reference to the southwestern states  / 
by V. L. Widermuth and E. V. Walter 
 - Washington  :   USDA 
 - 22 p. 
 - Bulletin ; 306 .
<br/><br/> Enc. con impresos similares 
<br/><br/><label>LCCN: </label>206407 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Afididos <br/>Aphis maidis <br/>Fitopatología -- colecciones de escritos <br/>Maíz -- plagas
<br/><br/><label>Dewey Class. No.: </label>PA-C 632 B85