Cooley, R.  A <br/><br/>
Spraying for oyster-shell scale  / 
by R. A. Cooley, J. R. Parker, W. S. Regan 
 - Bozeman, Montana  :   Agricultural Experiment Station 
 - 15 p. 
 - Montana. Agri. Exp. Sta., Circular; 124 .
<br/><br/><label>LCCN: </label>202154 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lepidosaphes ulmi  Aspersion -- Efecto en arboles frutales