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Auteur(s): Cowles, Richard Steven.
Date de publication: [2003]
Éditeur(s): Connecticut Agricultural Experiment Station
Contributeur(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Catégorie: Others
Le sujet(s): Fir--Diseases and pests--United States. , Balsam twig aphid--Control--United States. , Aphids--Control--United States. , Christmas tree industry--Economic aspects--United States.
mots-clés: Fir Diseases and pests United States. Balsam twig aphid Control United States. Aphids Control United States. Christmas tree industry Economic aspects United States.

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