2024-03-29T00:20:22Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:2130
2020-12-23T12:08:43Z
dLibraDigitalLibrary:contemporary_collection:periodicals dLibraDigitalLibrary dLibraDigitalLibrary:contemporary_collection dLibraDigitalLibrary:regional_collection dLibraDigitalLibrary:regional_collection:periodical