2024-03-19T11:59:53Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:5232
2022-06-24T16:37:42Z
dLibraDigitalLibrary:cultural_heritage dLibraDigitalLibrary dLibraDigitalLibrary:regional_collection:books dLibraDigitalLibrary:regional_collection