Conquering an Infinite Cave.
| Autor: | Moxley, Marion |
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| Předmět: | |
| Zdroj: | National Geographic; May2011, Vol. 219 Issue 5, following p10-10, 1/9p |
| Abstrakt: | A letter to the editor is presented in response to the article "Conquering an Infinite Cave," which appeared in a previous issue. |
| Databáze: | Complementary Index |
| Externí odkaz: |
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