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By: Patch, Edith M. (Edith Marion),Edition:Publication info: Orono, Maine Agricultural Experiment Station, 1912Volume: no.203Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Apples Diseases and pests Elm Woolly apple aphidBHL Collections: Early Women in Science | Women in Natural History
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By: Treherne, R. C. (Reginald Charles), - British Columbia. Horticultural Branch.Edition:Publication info: Victoria, B.C, W.H. Cullin, 1918Volume:Series:Holding Institution: Canadiana.orgSubjects: Agricultural pests Apple British Columbia Diseases and pests Woolly apple aphidBHL Collections:
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By: Marlatt, C. L. - United States. Bureau of Entomology.Edition: Rev. ed.Publication info: Washington, D.C, United States Dept of Agriculture, Bureau of Entomology, 1908Volume: ser.2:no.20Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Aphids Apples Diseases and pests Woolly apple aphidBHL Collections: