Humboldt an <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001919 http://d-nb.info/gnd/116140348">Johann Friedrich Pfaff</persName>, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010878 https://www.geonames.org/2919290">Goldkronach</placeName>, 12. November 1794, <bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/WFDJIWK6">Humboldt 1973</bibl>, 370.