The oyster-shell scale and the scurfy scale Quaintance, A. L creator Sasscer, E. R. text xx Washington Department of agriculture 1916 monographic und
print
16 p. by A. L. Quaintance and E. R. Sasscer Cochinilla Chionaspis furfura Lepidosaphes ulmi EUA. Dept. of Agriculture Farmers'bull.; 723 203573 220125 Para_5185