Wyniki
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Bruno of Querfurt and the Resolutions of the Gniezno Convention of 1000. Facts and Problems
Jan Tyszkiewicz
Quaestiones Medii Aevi Novae 5 (2000) s. 189-208 -
The Oldest Eastern Border of the Piast State - an Attempted Summary
Jan Tyszkiewicz
Quaestiones Medii Aevi Novae 9 (2004) s. 183-204