TY  - BOOK
AU  - Quaintance, A. L.
TI  - The oyster- shell scale and the scurfy scale
U1  - PA-C 595.7 B85 
CY  - Washington
PB  -  Department of Agriculture
KW  - Arboles frutales
KW  -  plagas
KW  - Insectos parásitos y predatores
KW  - Lepidosaphes ulmi
N1  - Encuadernado con: Studies of life histories of froghoppers of Maine / Herbert Osborn
ER  -