2024-03-28T12:36:24Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:2015
2020-12-23T11:44:51Z
dLibraDigitalLibrary:contemporary_collection:periodicals dLibraDigitalLibrary dLibraDigitalLibrary:contemporary_collection dLibraDigitalLibrary:regional_collection dLibraDigitalLibrary:regional_collection:periodical