Daszkiewicz, Piotr. “A Letter from Baron Christoph Burhardt Von Vietinghoff (1767–1829) to André Thouin (1747– 1824) – a Valuable Insight into the History of Science in the Baltic States”. Echa Przeszłości, no. XIX (January 8, 2019). Accessed August 24, 2024. https://czasopisma.uwm.edu.pl/index.php/ep/article/view/2711.