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  • Date de publication: 1934-].
  • Éditeur(s): [The Dept.
  • Contributeur(s): Biodiversity Heritage Library
  • Collection(s): Biodiversity Heritage Library
  • Catégorie: Others
  • Le sujet(s): Trees--Diseases and pests--Pennsylvania--Periodicals. ,  Forest insects--Control--Pennsylvania--Periodicals. ,  Pests--Control--Pennsylvania--Periodicals.
  • mots-clés: Trees Diseases and pests Pennsylvania Periodicals. Forest insects Control Pennsylvania Periodicals. Pests Control Pennsylvania Periodicals.

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