ScienceDirect
2025-02-01 ~ 현재
DOAB Directory of Open Access Books
2020
DOAB Directory of Open Access Books
Taylor & Francis eBooks (Open Access)
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OAPEN (Open Access Publishing in European Networks)
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DOAB Directory of Open Access Books
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Taylor & Francis eBooks (Open Access)
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DOAB Directory of Open Access Books
2026
DOAB Directory of Open Access Books
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DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2025
OAPEN (Open Access Publishing in European Networks)
2025
Taylor & Francis eBooks (Open Access)
2025
OAPEN (Open Access Publishing in European Networks)
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DOAB Directory of Open Access Books
2024
Springer Nature Link eBooks - Fully Open Access
2024