References

- Jennings, J.N., 1985, Karst geomorphology: Oxford, Basil Blackwell Ltd., 293 p.

-  http://www.cosis.net/abstracts/EGU04/06991/EGU04-A-06991.pdf, April 18, 2004

- Sweeting, Marjorie M., 1973, Karst Landforms: New York, Columbia University Press, 362 p.

- http://www.caves.org/conservancy/IKC/, April 29, 2004

- Orndorff, R.C., Goggin, K.E., 1994, Sinkholes and karst-related features of the Shenandoah
Valley in the Winchester 30´ x 60´ quadrangle, Virginia and West Virginia: U.S.
Department of the Interior, U.S. Geological Survey, 1 map ; 56 x 44 cm., on sheet 74 x 82
cm.

-  http://cwx.prenhall.com/bookbind/pubbooks/nebel2/medialib/update13.html, April 19, 2004

- Ruthven, C.L., Currens, J.C., 2002, Karst landscape-astonishing beauty and hidden hazards:
Kentucky Geological Survey, In Focus-April 2002

- Kentucky Geological Survey, 2001, Ground-water quality, Spring 2001, Kentucky Geological
Survey 2pgs.

- http://www.gcrio.org/geo/karst.html, April 28, 2004

- Ritter, D.F.; Kochel, C.R.; Miller, J.R.; 2002, Process geomorphology: New York, McGraw-Hill, 560 pgs.