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Creator Personal Names
Hill, Philip C.
Remove constraint Creator Personal Names: Hill, Philip C.
Creator Personal Names
Lieben, Jan.
Remove constraint Creator Personal Names: Lieben, Jan.
Subject Topical
Coal miners--Pennsylvania--Mortality.
Remove constraint Subject Topical: Coal miners--Pennsylvania--Mortality.
Subject Topical
Lungs--Dust diseases.
Remove constraint Subject Topical: Lungs--Dust diseases.
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