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You searched for: “Humboldt, Friedrich Wilhelm Heinrich Alexander, Baron von; Recueil d’observations astronomiques” with filters: Author="Humboldt, Alexander von"
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1Alexander von Humboldt to Thomas Jefferson, 12 June 1809 (Jefferson Papers)
Humboldt, Friedrich Wilhelm Heinrich Alexander, Baron von; Recueil d’observations astronomiques [...
2Alexander von Humboldt to Thomas Jefferson, 20 December 1811 (Jefferson Papers)
Humboldt, Friedrich Wilhelm Heinrich Alexander, Baron von; Recueil d’observations astronomiques [...