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| NON posseduto | |
| Autore principale: | Humboldt, Alexander von, 1769-1859.
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| Titolo: | General view of the scientific researches recently carried on in the Russian Empire / by Baron Alexander de Humboldt. |
| Note: | "In a discourse pronounced at the extraordinary sitting of the Imperial Academy of Sciences of St. Petersburg, held on the 28th November 1829." |
| In: |  Edinburgh journal of science Vol. 2 (1830), p. 286-300 |
| 000000172391 |
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