Penny, Charles L <br/><br/>
Petroleum emulsions  / 
Charles L. Penny 
 - Newark, Delaware  :   Agricultural Experiment Station 
 - 39 p. 
 - Delaware. Agri. Exp. Sta., Bull.; 75 .
<br/><br/><label>LCCN: </label>202062 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petróleo como insecticida