O'kane, W. C <br/><br/>
Lime sulphur in relation to San José and oyster shell scales  / 
by W. O'kane and J. G. Cohklin 
 - Durham, N. H.  :   Agricultural Experiment Station 
 - 14 p. 
 - New Hampshire Agri. Exp. Sta. Technical bulletin; 40 .
<br/><br/><label>LCCN: </label>202742 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Insecticidas  Control de plagas