References
- April 23 1940 . Conference on Health and Working Conditions in Tri-State District, Joplin, Mo , April 23 , Division of Labor Standards, United States Department of Labor .
- Waters , T. C. 1963 . Current Status of Compensation for Pneumoconioses , Legal Series, bulletin Vol. 4 , Pittsburgh , Pa : Industrial Hygiene Foundation of America, Inc. .
- Selleck , H. B. and Whittaker , A. H. 1962 . Occupational Health in America , Detroit : Wayne State University Press .
- 1938 . National Silicosis Conference , United States Department of Labor, US Government Printing Office . Bulletin 21, Parts 1–3
- 1959 . Anthracosilicosis and Commonwealth Expenditures Under Occupational Disease Law , Harrisburg , Pa : Pennsylvania General Assembly, Joint State Government Commission .
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