Roark, R. C <br/><br/>
A third list of publications on DDT January through june 1945  / 
R. C. Roark 
 - Washington  :   Department of Agriculture 
 - 28 p. 
 - EUA. Department of Agriculture E; 674 .
<br/><br/><label>LCCN: </label>202873 
<br/><br/><label>Subjects--Topical Terms: </label><br/>D.D.T. (Insecticida) -- Bibliografía