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  1. Bibliography of the geology of Connecticut,
    By: Gregory, Herbert E.
    Publication info: [Hartford]Hartford Press, The Case, Lockwood & Brainard Company,1907.
    Contributed by: Wellesley College Library (archive.org)
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  2. Bibliography of the geology of Connecticut, by Herbert Ernest Gregory.
    By: Gregory, Herbert E.
    Publication info: [Hartford]Hartford Press, The Case, Lockwood & Brainard Company,1907.
    Contributed by: University of Connecticut Libraries (archive.org)
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  3. Manual of the geology of Connecticut /
    By: Rice, William North, - Gregory, Herbert E.
    Publication info: [Hartford] :Hartford Press, The Case, Lockwood & Brainard Company,1906.
    Contributed by: Wellesley College Library (archive.org)
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  4. Preliminary geological map of Connecticut /
    By: Gregory, Herbert E. - Robinson, Henry Hollister,
    Publication info: Hartford :Hartford Press, The Case, Lockwood & Brainard Company,1907.
    Contributed by: Wellesley College Library (archive.org)
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