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Caves Beyond: The Story of Floyd Collins' Crystal Cave Exploration Author: ? Book Type: Paperback Publication Date: 1975 |
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Jewel Cave Adventure: Fifty Miles of Discovery in South Dakota Author: 1 Book Type: Paperback Publication Date: 1981 |
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In the Ice Caves of Krog (Secrets of Droon, Bk 20) Author: 8 Book Type: Paperback Publication Date: 2003 |
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