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| NON posseduto | |
| Autore principale: | Euler, Leonhard, 1707-1783.
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| Titolo: | On the perfection of microscopes / by Leonard Euler. |
| Note: | Extract from "Detailed instructions to bring telescopes of different kinds to the highest degree of perfection ..." : published St. Petersburg, 1774 |
| In: |  Edinburgh journal of science Vol. 5 (1831), p. 233-237 |
| 000000172456 |
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