1. Freeze, R.A. and Cherry, J.A., 1979, Groundwater, Prentice-Hall, Inc., Englewood Cliffs, N.J. 07632, 604 p.
2. Hlting, B., 1992, Hydrogeologie—Einf hrung in die Allgemeine und Angewandte Hydrogeologie. Stuttgart: Enke. 320 p.
3. Hong, S.H. and Lee, B.J., 1982, Geological map of Korea, An Yang sheet-6526-II (1∶50,000). Korea Institute of Geology, Mining & Materials, 19 p.
4. Hong, S.H., Lee, B.J. and Hwang, S.K., 1982, Geological map of Korea, A Seoul sheet-6527-II (1∶50,000). Korea Institute of Geology, Mining & Materials, 19 p.
5. Kim, N.J. and Hong, S.H., 1975, Geological map of Korea, An Yang sheet-6526-II. Korea Institute of Geology Mining & Materials, 20 p.