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Psyche
Volume 25, Issue 2, Pages 19-23
http://dx.doi.org/10.1155/1918/18935

Key and Descriptions for the Separation and Determination of the First Instar Stem Mothers of the Three Species of Aphids Most Commonly Attacking the Cultivated Apple

U. S. Bureau of Entomology, Melrose Highlands, Mass., USA

This article is in the public domain.

Abstract

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