00408nas a2200157   4500000000100000000000100001008004100002260001200043100001900055700003200074700001900106700002000125700001600145245008300161490000600244       2021                            d  c06/20211 aWojciech Kempa1 aJoanna Rydarowska-Kurzbauer1 aMarzena Halama1 aElżbieta Smuda1 aMaciej Biel00aStatistical and Econometric Analysis  of Selected Effects of COVID-19 Pandemic0 v4