1. World Health Organization. Residential heating with wood and coal: health impacts and policy options in Europe and North America.
2. Chen W, Zhuang Z, Attfield M, Chen B, Gao P, Harrison J, Fu C, Chen J, Wallace W. Exposure to silica and silicosis among tin miners in China: exposure-response analyses and risk assessment. Occup Environ Med. 2001;58:31–7.
3. West Virginia Department of Culture and History. Hawk’s nest tunnel disaster. Retrieved 2008-11-25.
4. Rantanen J, Fedotov IA. Standards, principles and approaches in occupational health services. Article, July 2002. http://www.ilo.org/safework/info/publications/WCMS_110439/lang--en/index.htm
5. Bang KM, Attfield MD, Wood JM, Syamlal G. National trends in silicosis mortality in the United States: 1981–2004. Am J Ind Med. 2008;51(9):633–9.