Printed Ephemera Collection

You searched for: Creator Personal Names Lapp, N. LeRoy. Remove constraint Creator Personal Names: Lapp, N. LeRoy. Digital Content No Digital Content Remove constraint Digital Content: No Digital Content All Subjects Coal miners--Diseases. Remove constraint All Subjects: Coal miners--Diseases. All Subjects Pneumoconiosis. Remove constraint All Subjects: Pneumoconiosis. All Subjects Respiratory organs--Obstructions. Remove constraint All Subjects: Respiratory organs--Obstructions. Subject Topical Respiratory organs--Obstructions. Remove constraint Subject Topical: Respiratory organs--Obstructions.