| Alexander von Humboldt - Bitterling, Richard |
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| Friedrich Wilhelm Heinrich Alexander Freiherr von Humboldt (September 14, 1769 – May 6, 1859) was a German naturalist and explorer. Humboldt's quantitative work on botanical geography was the foundation of the field of biogeography. |
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| Notes |
| Im Frühjahr 1959. Zum hunderstsent Illustriert |