2024-03-28T16:33:20Z
http://bc.umcs.pl/oai-pmh-repository.xml
oai:bc.umcs.pl:461
2009-05-28T12:54:40Z
dLibraDigitalLibrary:ScienceandEducation dLibraDigitalLibrary dLibraDigitalLibrary:regional dLibraDigitalLibrary:ScienceandEducation:ScientificPapers