@Book{ 000952199, author = {Soberski, Grégoire}, title = {Warowny gród z epoki żelaza Biskupin}, location = {Bydgoszcz}, publisher = {Pomorze}, year = {1991}, crossref = {https://zenon.dainst.org/Record/000952199}, url = {https://zenon.dainst.org/Record/000952199}, urldate ={2024-03-28}, }