Erdmann, Dominik, and Monika Jaglarz, eds. Der Nachlass Alexander Von Humboldt in Der Jagiellonen-Bibliothek. Vol. Bibliotheca Iagellonica. Fontes et Studia, Vol. 37. Bibliotheca Iagiellonica. Fontes et Studia. Poland: Księgarnia Akademicka Publishing, 2019. Accessed January 1, 2026. https://books.akademicka.pl/publishing/catalog/book/69.