2024-03-29T15:54:23Z
http://bc.umcs.pl/oai-pmh-repository.xml
oai:bc.umcs.pl:196
2021-09-06T12:40:52Z
dLibraDigitalLibrary:ScienceandEducation dLibraDigitalLibrary dLibraDigitalLibrary:regional dLibraDigitalLibrary:ScienceandEducation:ScientificPapers
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