The Golden Jubilee of Professor Ignacy Ryszard Danka’s Doctorate Authors Krzysztof T. Witczak University of Łódź image/svg+xml https://orcid.org/0000-0001-8895-974X (unauthenticated) Jerzy Gaszewski University of Łódź image/svg+xml https://orcid.org/0000-0002-9313-6454 (unauthenticated) Downloads PDF Published 31.12.2020 Issue Eos CVII (2020), fasc. 1–2 Section Commentarii