@misc{Hensel_Witold_(1917–2008)_Polska_1960, author={Hensel, Witold (1917–2008)}, copyright={Rights Reserved - Restricted Access}, address={Wrocław i in.}, howpublished={online}, year={1960}, publisher={Zakł. Narodowy im. Ossolińskich}, title={Polska przed tysiącem lat}, keywords={Bronze Age-Iron Age -- Poland, early Middle Ages -- Poland, Proto-Slavs -- Poland, Polish state -- beginnings, state -- organization, early medieval settlement -- Poland, early medieval economy, early medieval art, cultural contacts in the early Middle Ages}, }