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woolly aphis
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View The woolly aphis of the apple By Charles Lester Marlatt
The woolly aphis of the apple
The woolly aphis of the apple
By Charles Lester Marlatt
View Horticultural aspects of woolly aphis control together with a survey of the literature By R. M. Greenslade
Horticultural aspects of woolly aphis control together with a survey of the literature
Horticultural aspects of woolly aphis control together with a survey of the literature
By R. M. Greenslade
View Biennial Report By Oregon Board of Horticulture,Board of Horticulture,Oregon 
Biennial Report
By Oregon Board of Horticulture,Board of Horticulture,Oregon
View Woolly aphis of the apple (Schizoneura lanigera Hausmann) By C.L. Marlatt 
Woolly aphis of the apple (Schizoneura lanigera Hausmann)
By C.L. Marlatt