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1by Miller, Ernest C. (Ernest Conrad), 1912-Subjects: “...Petroleum industry and trade Pennsylvania History....”
Published 1968
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2by Fletcher, S. W. (Stevenson Whitcomb), 1875-Subjects: “...Agriculture Pennsylvania History....”
Published 1950
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3Subjects: “...Indians of North America Pennsylvania History To 1500....”
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4Published 1979“...Pennsylvania History Sources Congresses....”
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5Published 1957“...Pennsylvania History Bibliography....”
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6Published 1959“...Pennsylvania History Bibliography....”
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7Published 1976“...Pennsylvania History Sources Bibliography Catalogs....”
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8Published 1966“...Pennsylvania History Colonial period, ca. 1600-1775....”
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9Published 1966“...Pennsylvania History Colonial period, ca. 1600-1775 Sources....”
Book