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You searched for: All Creators Akers, David J. (David Jackson), 1944- Remove constraint All Creators: Akers, David J. (David Jackson), 1944- All Subjects Coal mines and mining--Waste disposal. Remove constraint All Subjects: Coal mines and mining--Waste disposal. Subject Topical Coal preparation plants--Waste disposal. Remove constraint Subject Topical: Coal preparation plants--Waste disposal.

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