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  1. History of Delaware County, Pennsylvania : from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science /
    By: Smith, George, - Delaware County Institute of Science.
    Publication info: Philadelphia, Pa. :H.B. Ashmead,1862.
    Contributed by: Allen County Public Library Genealogy Center (archive.org)
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  2. History of Delaware County, Pennsylvania : from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science /
    By: Smith, George, - Delaware County Institute of Science.
    Publication info: Philadelphia :Printed by Henry B. Ashmead,1862.
    Contributed by: University of Pittsburgh Library System (archive.org)
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  3. History of Delaware County, Pennsylvania, from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science,
    By: Smith, George, - Delaware County Institute of Science.
    Publication info: Philadelphia,Printed by H.B. Ashmead,1862.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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