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Greenville, Mercer County, Pennsylvania
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Mahoning Valley Historical Society
Youngstown, Ohio. Serving Mahoning, Trumbull, Columbiana, parts of Stark & Portage counties in Ohio and parts of Lawrence and Mercer counties in Pennsylvania.
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Mercer County Genealogical Society
Sharon, Pennsylvania
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Western Pennsylvania Genealogical Society
Pittsburgh.
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Western Pennsylvania Genealogical Society Library
Includes searchable online catalog.
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United States » Pennsylvania » Counties » Mercer » Societies & Groups
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