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  1. Observations on fossil vegetables accompanied by representations of their internal structure as seen through the microscope
    By: Witham, Henry Thornton Maire
    Publication info: Edinburgh : T. Blackwood
    Contributed by: United States Geological Survey
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  2. The internal structure of fossil vegetables found in the carboniferous and oolitic deposits of Great Britain
    By: Witham, Henry Thornton Maire
    Publication info: Edinburgh : A.
    Contributed by: United States Geological Survey
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