WALECKI, Wacław; SIESS-KRZYSZKOWSKI, Stanisław. News from the birthplace of the National Polish Bibliography and two faces of the “Estreicher”. Poznańskie Studia Slawistyczne, [S. l.], n. 30, p. 145–160, 2026. DOI: 10.14746/pss.2026.30.6. Disponível em: https://pressto.amu.edu.pl/index.php/pss/article/view/56957. Acesso em: 17 sep. 2026.