2024-03-29T06:39:08Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:2143
2020-12-23T12:11:25Z
dLibraDigitalLibrary:contemporary_collection:periodicals dLibraDigitalLibrary dLibraDigitalLibrary:contemporary_collection dLibraDigitalLibrary:regional_collection dLibraDigitalLibrary:regional_collection:periodical