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Subject Personal Names
Reger, David B. (David Bright), 1882-1958.
Remove constraint Subject Personal Names: Reger, David B. (David Bright), 1882-1958.
All Subjects
Coal mines and mining.
Remove constraint All Subjects: Coal mines and mining.
Subject Topical
Petroleum--Appalachian Mountains.
Remove constraint Subject Topical: Petroleum--Appalachian Mountains.
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