Johnson, W. G. <br/><br/>
Some important insecticides, fungicides and apparatus for their application  / 
W. G. Johnson, C. O. Townsend, and H. P. Gould 
 - College Park  :   Maryland Agricultural College 
 - p. 55-89 
 - Maryland Agr. Exp. Sta. Bull; 65 .
<br/><br/><label>LCCN: </label>203439 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aspersores  Insecticidas  Fungicidas