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| NON posseduto | |
| Autore principale: | Humboldt, Alexander von, 1769-1859.
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| Titolo: | Observations on the mean temperature of the equatorial regions / by Baron Alexander Humboldt. |
| In: |  Edinburgh journal of science Vol. 6 (1827), p. 136-144 |
| 000000171988 |
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