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> Francis W. Pennell
Francis W. Pennell
All books by Francis W. Pennell
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Displaying 4 Books
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Botanical collectors of the Philadelphia local area
Francis W. Pennell
Flora of the Conowingo Barrens of Southeastern Pennsylvania
Francis W. Pennell
Further notes on the flora of the Conowingo or Serpentine Barrens of Southwestern Pennsylvania
Francis W. Pennell
Symposium on botanical nomenclature
Earl Edward Sherff
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