Phisical Environment of Sehwa-Songdang Lava Region |
Byeon, Dae-Jun (The Korean Speleological Society) |
1 | Trowbridge, A. C. 1921. The erosional history of the Driftless Area. University of Iowa, Studies in Natural History, 9, 7-127 |
2 | Palmquist, R. C. 1965. Geomorphic Development of Part of the Driftless Area, Southwest Wisconsin. University of Wisconsin, Ph.D Thesis, 182p |
3 | Bogli, A. 1980. Karst hydrology and physical speleology, Berlin, Springer |
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