Newcomer, E. J. <br/><br/>
Experiment for the control of the San José scale with lubricating-oil emulsions in the Pacific Northwest  / 
by E. J. Newcomer and M. A. Yothers 
 - Washington  :   Department of Agriculture 
 - 12 p. 
 - EUA. Dep. of Agri. Circular; 175 .
<br/><br/><label>LCCN: </label>203917 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aspidiotus  Petróleo como insecticida  Control de plagas