2024-03-19T04:53:58Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:44784
2022-09-14T10:24:09Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials:History KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary:EducationalMaterials:Science KujawskoPomorskaDigitalLibrary:EducationalMaterials:Astronomy KujawskoPomorskaDigitalLibrary