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Humboldt, Alexander von, 1769-1859

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Cover of Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2

Aimé Bonpland

3.0
Cover of Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1

Aimé Bonpland

3.9
Cover of Letters of Alexander von Humboldt to Varnhagen von Ense.: From 1827 to 1858. With extracts from Varnhagen's diaries, and letters of Varnhagen and others to Humboldt

Letters of Alexander von Humboldt to Varnhagen von Ense.: From 1827 to 1858. With extracts from Varnhagen's diaries, and letters of Varnhagen and others to Humboldt

Alexander von Humboldt

3.2
Cover of Humboldt: From 'The Gods and Other Lectures'

Humboldt: From 'The Gods and Other Lectures'

Robert Green Ingersoll

2.4