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Genealogical and biographical annals of Northumberland County, Pennsylvania : containing a genealogical record of representative families, including many of the early settlers .
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Index to wills of Northumberland County, Pennsylvania
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Census of 1840, Northumberland County, Pa
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Snyder County Annals
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Index to Annals of Buffalo Valley : by John Blair Linn
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Index for the Johnstonbaugh genealogy
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Mother Northumberland County, Pennsylvania
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Northumberland County in the American Revolution
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History of Northumberland County, Pennsylvania
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Frontier rangers from Northumberland County, PA, 1778-1783
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George Wolf d 1809 of East Hanover township, Lancaster Co, Pa, Northumberland County, Pa, Centre County, Pa
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Index to Streby's History of Sullivan County, Pa
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The annals of the Heechee
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Annals of the Oley Valley in Berks County, Pa. : over two hundred years of local history of an American Canaan
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Annals of Luzerne County; a record of interesting events, traditions, and anecdotes
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Northumberland : the story of an old town, 1829-1929
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Biographical annals of Lancaster County, Pennsylvania
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Index to Greene County, Pa. wills, 1796-1900
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Index to Butler County, Pa., wills, 1800-1900
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Index to Washington County, Pa., wills, 1781-1900
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Index to Indiana County, Pa. wills, 1803-1900
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Index to Cambria County, Pa. wills, 1804-1900
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Index to Westmoreland County, Pa. wills, volumes 1
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Clinton County, PA, wills index 1839-1994
