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Creator Personal Names
Hill, Philip C.
Remove constraint Creator Personal Names: Hill, Philip C.
Subject Topical
Coal miners--Diseases--Pennsylvania.
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Subject Topical
Coal miners--Pennsylvania--Mortality.
Remove constraint Subject Topical: Coal miners--Pennsylvania--Mortality.
Subject Topical
Pneumoconiosis--Pennsylvania.
Remove constraint Subject Topical: Pneumoconiosis--Pennsylvania.
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