2024-03-29T02:24:28Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:22277
2012-01-02T11:53:50Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials:Mathematics KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary