Author: Alexander von Humboldt

Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.3
Alexander von Humboldt, Aimé Bonpland

Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.2
Alexander von Humboldt, Aimé Bonpland

Cosmos: A Sketch of a Physical Description of The Universe: Introduction
Alexander von Humboldt

Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.1
Alexander von Humboldt