Biodiversity Heritage Library

By: Marlatt, C. L. - United States. Division of Entomology.

Edition:

Publication info: [Washington, DC], USDA, 1897

Volume: ser.2:no.20

Series:

Holding Institution: U.S. Department of Agriculture, National Agricultural Library

Subjects: Aphids  Apples  Diseases and pests  Woolly aphis

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