| 1 |
Consideration of the Problems with the Information Board of Gosu Cave's Viewing Objects
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[Jo, Mi-Ryung;] / Journal of the Speleological Society of Korea 
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| 2 |
The Problems and Counter Plans about Tour Information of the Ondal Cave Objects
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[Hong, Hyun-Chol;] / Journal of the Speleological Society of Korea
|
| 3 |
Trends of Cave Study in Korea
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[Hong, Hyun-Cheol;Kim, Won-Jin;You, Young-Jun;] / Journal of the Speleological Society of Korea
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