2024-03-28T16:39:12Z
http://pbc.up.krakow.pl/oai-pmh-repository.xml
oai:pbc.up.krakow.pl:7576
2024-01-18T07:56:53Z
PedagogicalDigitalLibrary:textbook_museum PedagogicalDigitalLibrary:muzeum_bgup PedagogicalDigitalLibrary PedagogicalDigitalLibrary:textbook_museum:mathematics