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Kowalski, M.D. 2022. Unknown document of Mieszko the Tanglefoot from 1207–1211. An armed return of the Władysław the Exile’s sons to Silesia. Studia Źródłoznawcze. Commentationes. 60, (Dec. 2022), 111–123. DOI:https://doi.org/10.12775/SZ.2022.07.