Witkowska, Ewa, and Wiesław Wróbel. “The Unknown Manuscrips of Feliks Schober in the Collection of the Jerzy Giedroyc University Library in Bialystok”. Bibliotekarz Podlaski 46, no. 1 (April 3, 2020): 197–213. Accessed April 29, 2024. https://bibliotekarzpodlaski.pl/index.php/bp/article/view/426.