Johnson, Elmer <br/><br/>
Dusting machinery for cotton boll weevil control  / 
Elmer Johnson and B. R. Coad 
 - Washington  :   Department of Agriculture 
 - 31 p. 
 - EUA. Dept. of Agriculture Farmers'bull; 1098 .
<br/><br/><label>LCCN: </label>203739 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aspersores  Control de plagas  Anthonomus grandis.