@techreport{Polish Statistical Office2023,
author = {Polish Statistical Office},
title= {2023 – 05 –  Ludność według płci, wieku, województw i Powiatów},
year = {2023},
URL = {https://demografia.stat.gov.pl/BazaDemografia/Tables.aspx},
publisher = {Polish Statistical Office},
address = {Warsaw},
institution = {Demographic Database},
}