1. E. T. Anderson , 1999 .Determining the Sustainability of Coal Mine Cavity Discharge as a Drinking Water Source . Unpublished MS. Thesis, Civil Engineering, Virginia Tech, Blacksburg, Virginia, 147 pp.
2. D. C. Ford, and P. W. Williams , 1989 .Karst Geomorphology and Hydrology : Unwin Hyman Ltd., London, 601 pp.
3. G. E. Harlow, and G. D. LeCain , 1991 . Hydraulic Characteristics of, and Ground-Water Flow in Coal-Bearing Rocks of Southwestern Virginia . U.S. Geological Survey, Open-File Report 91-250, 36 pp.
4. W. A. Hobba , 1981 .Abandoned Coal Mines in West Virginia as Sources of Water Supplies . West Virginia Geological and Economic Survey, Morgantown, West Virginia, 18 pp.