2024-03-29T12:23:37Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:2115
2020-12-23T12:03:24Z
dLibraDigitalLibrary:contemporary_collection:periodicals dLibraDigitalLibrary dLibraDigitalLibrary:contemporary_collection dLibraDigitalLibrary:regional_collection dLibraDigitalLibrary:regional_collection:periodical