2024-03-29T01:26:53Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:88658
2016-01-29T10:37:48Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary:EducationalMaterials:Astronomy KujawskoPomorskaDigitalLibrary