The Unicorn Cave, Southern Harz Mountains, Germany: From known passages to unknown extensions with the help of geophysical surveys
| Autor: | Kaufmann, Georg, Nielbock, Ralf, Romanov, Douchko |
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| Zdroj: | In Journal of Applied Geophysics December 2015 123:123-140 |
| Databáze: | ScienceDirect |
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