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Creator Personal Names
Forbes, John J. V. (John Joseph Vincent), 1885-1975.
Remove constraint Creator Personal Names: Forbes, John J. V. (John Joseph Vincent), 1885-1975.
All Subjects
Coal mines and mining--Safety measures.
Remove constraint All Subjects: Coal mines and mining--Safety measures.
Subject Topical
Mine explosions.
Remove constraint Subject Topical: Mine explosions.
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