2024-03-29T02:26:35Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:22266
2012-01-02T11:53:50Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials:Mathematics KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary