<bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/KHE8NKNA">Humboldt 1859–1860</bibl>, <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.deutschestextarchiv.de/humboldt_aequinoktial04_1859/281">IV, 273</ref>. Vgl. <bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/ZCSQAGM6">Humboldt/Oltmanns 1810</bibl>, I, 92, und <bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/UQGSA7CH">Brand 2015</bibl>, 33.