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  1. The polar and tropical worlds : a description of man and nature in the polar and equatorial regions of the globe /
    By: Hartwig, G. - Guernsey, Alfred H.
    Publication info: Springfield, Mass. :Published by Bill, Nichols & Company,1872, c1871.
    Contributed by: Smithsonian Libraries
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  2. The polar and tropical worlds : a description of man and nature in the polar and equatorial regions of the globe / by G. Hartwig ; edited, with additional chapters, by A. H. Guernsey.
    By: Hartwig, G. - Guernsey, Alfred H.
    Publication info: San Francisco :A. L. Bancroft,1871.
    Contributed by: University of California Libraries (archive.org)
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