2024-03-29T07:38:34Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:88650
2016-01-29T10:39:12Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary:EducationalMaterials:Astronomy KujawskoPomorskaDigitalLibrary