DOAB Directory of Open Access Books
2019
DOAB Directory of Open Access Books
2022
DOAJ: Directory of Open Access Journals
2012-01-01 ~ 현재
OAPEN (Open Access Publishing in European Networks)
2022
DOAB Directory of Open Access Books
2022
Books at JSTOR: Open Access
2022
DOAB Directory of Open Access Books
2024
DOAB Directory of Open Access Books
2026
DOAB Directory of Open Access Books
2016
De Gruyter Brill Open Access eBooks
2016
OAPEN (Open Access Publishing in European Networks)
2023
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2023
OAPEN (Open Access Publishing in European Networks)
2025
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2008