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| NON posseduto | |
| Titolo: | Account of the great congress of philosophers at Berlin on the 18th September 1828 / communicated by a correspondent. |
| Note: | "Speech made at the opening of the Society of German Naturalists and Natural Philosphers at Berlin, the 18th September 1828 ; by Alexander von Humboldt": p. 227-232 |
| In: |  Edinburgh journal of science Vol. 10 (1829), p. 225-234 |
| Altri autori: | Humboldt, Alexander von, 1769-1859.
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| 000000172211 |
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