2024-03-28T20:11:58Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:2147
2020-12-23T12:11:47Z
dLibraDigitalLibrary:contemporary_collection:periodicals dLibraDigitalLibrary dLibraDigitalLibrary:contemporary_collection dLibraDigitalLibrary:regional_collection dLibraDigitalLibrary:regional_collection:periodical