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              Browse All : Text Page by C. & A. Conrad and Maclure, William
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    Author 
        Maclure, William 
      Full Title 
        (Text Page to) Observations on the Geology of the United States, explanatory of a Geological Map. By William Maclure. Read January 20th, 1809. (In) Transactions of the American Philosophical Society, Held at Philadelphia, for promoting Useful Knowledge. Volume VI. Published by C. and A. Conrad and Co. Philadelphia. ... Jane Aitken, Printer. 1809. 
      Publisher 
        C. & A. Conrad 
      
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