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4 Pages in Charles Darwin's Library associated with "strata/epochs - silurian, upper"

  1. A manual of elementary geology.
    By: Lyell, Charles.
    Publication info: [s.n.] :[s.n.],1855.
    Pages: Page 446  Page 447  Page 457  
  2. Supplement to the fifth edition of A manual of elementary geology.
    By: Lyell, Charles.
    Publication info: London :John Murray,1857.
    Pages: Page 30