1Finkelman RB, Orem W, Castranova V, et al. Health impacts of coal and coal use: possible solutions[J]. Intern J Coal Geol, 2002,50:425-443.
2Ando M, Tadano M, Asanuma S, et al. Health effects of indoor fluoride pollution from coal burning in China[J]. Environ Health Perspect, 1998,106(5) :239-244.
3Crowley SS, Orem WH, Roth MJ, et al. Possible relation between esophageal cancer and coal combustion in China: a preliminary study. Fif-teenth Annual Meeting of the Society for Organic Petrology[C]. Abstr Progr, 1998,15:97-99.
