2024-03-29T13:23:03Z
https://obc.opole.pl/oai-pmh-repository.xml
oai:obc.opole.pl:5241
2019-08-30T12:00:57Z
dLibraDigitalLibrary:cultural_heritage dLibraDigitalLibrary dLibraDigitalLibrary:regional_collection:books dLibraDigitalLibrary:regional_collection