2024-03-29T09:22:34Z
http://bc.umcs.pl/oai-pmh-repository.xml
oai:bc.umcs.pl:1613
2021-08-26T11:16:54Z
dLibraDigitalLibrary:ScienceandEducation dLibraDigitalLibrary dLibraDigitalLibrary:regional dLibraDigitalLibrary:ScienceandEducation:ScientificPapers