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Creator Personal Names
Reger, David B. (David Bright), 1882-1958.
Remove constraint Creator Personal Names: Reger, David B. (David Bright), 1882-1958.
All Subjects
Geology, Stratigraphic--Pennsylvania.
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Subject Topical
Sedimentation and deposition.
Remove constraint Subject Topical: Sedimentation and deposition.
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