2024-03-28T21:13:29Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:73551
2012-06-25T12:30:34Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials:History KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary:EducationalMaterials:Astronomy KujawskoPomorskaDigitalLibrary