3Gao GL, Yan B, Yang L. Determination of total fluorine in coal by the combustion-hydrolysis/fluoride-ion selective electrode method[J]. Fuel, 1984,63 ( 11 ) : 1552-1555.
9Wu D S,Zheng B S,Wang A M,et al.Fluoride Exposure From Burning Coal-clay in Guizhou Province,China[J].Fluoride,2004,37(1):20-27.
10Wu D S,Zheng B S,Wang A M.The new Characteristics of Coal-burning Bndemic Fluorosis in Some Areas in North-western Guizhou[J].Metal Ions in Biology and Medicine,2004,8:510-513.