2024-03-28T20:48:01Z
https://journals.us.edu.pl/index.php/PR/oai
oai:ojs.www.journals.us.edu.pl:article/3536
2015-10-03T14:36:37Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/3564
2015-08-21T12:15:56Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/3628
2016-04-24T10:53:35Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/6314
2018-09-21T12:30:25Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/6984
2018-09-21T12:30:25Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/7833
2021-07-12T22:43:23Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/12543
2022-04-25T16:32:59Z
PR:VA
oai:ojs.www.journals.us.edu.pl:article/15446
2023-06-19T12:28:26Z
PR:VA