2024-03-28T15:44:48Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:78016
2017-10-27T12:39:09Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials:Chemistry KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary