magazines
Warsaw Numismatic Diary 8, journal of the Warsaw branch of the Polish Numismatic Society, Warsaw 2020, ISSN 2300-1321
212 pages, inside articles on the attribution of denarii with a double cross as a coin of Władysław Jagiełło, finds of late medieval coins from Kościelna Wieś near Kalisz, varieties of labrys on the Bydgoszcz orts of Sigismund III Vasa, sixpences minted at the Poznan mint under the management of Mikołaj Gille, naming of coin denominations, substitute money in the Wschowa district at the turn of the 19th and 20th centuries, the history of debt securities in the Second Polish Republic, and counterfeiting of money in the territory of the General Government