2024-03-29T13:29:40Z
http://pbc.up.krakow.pl/oai-pmh-repository.xml
oai:pbc.up.krakow.pl:6919
2023-10-18T11:21:38Z
PedagogicalDigitalLibrary:textbook_museum PedagogicalDigitalLibrary:muzeum_bgup PedagogicalDigitalLibrary PedagogicalDigitalLibrary:textbook_museum:mathematics