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By: Bertrand, Paul,Edition:Publication info: Lille, Impr. L. Danel, 1909Volume: TextSeries:Holding Institution: Harvard University Botany LibrariesSubjects: Filices, Fossil ZygopteraceaeBHL Collections:
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By: Gothan, Walther (Walther Ulrich Eduard Friedrich),Edition:Publication info: Berlin, Königlich Preussischen Geologischen Landesanstalt, 1913Volume: v.1 (1913)Series:Holding Institution: New York Botanical Garden, LuEsther T. Mertz LibrarySubjects: Carboniferous Filices, Fossil Paleontology SilesiaBHL Collections: