@misc{Piech_Zenon_(1954–_)_O_1992, author={Piech, Zenon (1954– )}, volume={99}, number={3}, editor={Institute of History of the Polish Academy of Sciences}, copyright={Rights Reserved - Free Access}, address={Warszawa}, journal={Kwartalnik Historyczny}, howpublished={online}, year={1992}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, type={Text}, title={O średniowiecznej sfragistyce i heraldyce książęcej na Śląsku}, URL={http://www.rcin.org.pl/Content/3742/PDF/WA303_3939_KH99-r1992-R99-nr3_Kwartalnik-Historyczny%2001%20Piech.pdf}, keywords={heraldry - Poland - Silesia - Middle Ages, seals (numismatics) - Poland - Silesia - Middle Ages, sigillography, kings and rulers - Silesia (region) - Middle Ages}, }