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Creator Personal Names
Nicolls, G. A. (Gustavus A.), 1817-1886.
Remove constraint Creator Personal Names: Nicolls, G. A. (Gustavus A.), 1817-1886.
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Railroads--Pennsylvania.
Remove constraint All Subjects: Railroads--Pennsylvania.
Subject Topical
Anthracite coal industry--Pennsylvania.
Remove constraint Subject Topical: Anthracite coal industry--Pennsylvania.
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