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  1. By: Alling, Harold L. (Harold Lattimore),
    Publication info: Albany, The University of the State of New York, 1928
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    Subjects: From 405 to 425 million years ago  Geology  Geology, Stratigraphic  New York (State)  Salt mines and mining  Silurian  Silurian Geologic Period  
    BHL Collections: Expanding Access to Biodiversity Literature
  2. By: Chadwick, George Halcott,
    Publication info: Albany, University of the State of New York, 1944
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    Subjects: Catskill Mountains  Catskill Mountains (N.Y.)  Devonian  Devonian Geologic Period  From 345 to 425 million years ago  Geology  Geology, Stratigraphic  New York (State)  Silurian  Silurian Geologic Period  
    BHL Collections: Expanding Access to Biodiversity Literature
  3. By: Murchison, Roderick Impey, Sir,
    Edition: 5th ed. With map and two hundred illustrations.
    Publication info: London, J. Murray, 1872
    Holding Institution: Field Museum of Natural History Library
    Subjects: From 405 to 425 million years ago  Geology, Stratigraphic  Gold  Silurian  Silurian Geologic Period  Silurien, géologie  Silurien, paléontologie  
  4. By: Barrande, Joachim, - Oudin, A. S. - Perner, Jaroslav. - Počta, Felip (Philipp), - Waagen, Wilhelm Heinrich,
    Publication info: À Prague Chez l'auteur et éditeur 1852-1911
    Holding Institution: Multiple institutions
    Subjects: Bohême (République tchèque)  Bohemia  Czech Republic  Fossiles  From 405 to 425 million years ago  Invertebrates, Fossil  Invertébrés  Paleontologie  Paleontology  République tchèque  Silurian  Silurian Geologic Period  Silurien  
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection