Search Constraints

You searched for: Creator Personal Names Beatty, J. A. Remove constraint Creator Personal Names: Beatty, J. A. Creator Personal Names Crawford, George M. Remove constraint Creator Personal Names: Crawford, George M. All Subjects Coal mines and mining--Pennsylvania. Remove constraint All Subjects: Coal mines and mining--Pennsylvania. All Subjects Lungs--Dust diseases. Remove constraint All Subjects: Lungs--Dust diseases. Subject Topical Pneumoconiosis. Remove constraint Subject Topical: Pneumoconiosis. Subject Topical Respiratory organs--Obstructions. Remove constraint Subject Topical: Respiratory organs--Obstructions.

Search Results