2024-03-29T01:06:52Z
http://pbc.up.krakow.pl/oai-pmh-repository.xml
oai:pbc.up.krakow.pl:6042
2024-01-16T12:27:37Z
PedagogicalDigitalLibrary:textbook_museum PedagogicalDigitalLibrary:Dziedzictwo PedagogicalDigitalLibrary PedagogicalDigitalLibrary:Dziedzictwo:Books PedagogicalDigitalLibrary:textbook_museum:chemistry