Nocuń, P. 2022. Protection and popularization of archaeological heritage as an object of activity of a nongovernmental organisation supported by a university – an example of medieval ducal tower in Siedlęcin near Jelenia Góra. Archaeologia Historica Polona. 29, (cze. 2022), 155–173. DOI:https://doi.org/10.12775/AHP.2021.009.