Attachment 4: Metropolis GZM as of 1 January 2020

Statistics Poland (Główny Urząd Statystyczny), available online at: https://stat.gov.pl/en/regional-statistics/classification-of-territorial-units/other-territorial-units/gornoslasko-zaglebiowska-metropolis-metropolis-gzm/ , accessed 29.12.2020.