Quaintance, A. L <br/><br/>
The oyster-shell scale and the scurfy scale  / 
by A. L. Quaintance and E. R. Sasscer 
 - Washington  :   Department of agriculture 
 - 16 p. 
 - EUA. Dept. of Agriculture Farmers'bull.; 723 .
<br/><br/><label>LCCN: </label>203573 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cochinilla  Chionaspis furfura  Lepidosaphes ulmi.