DOAB Directory of Open Access Books
2000
DOAB Directory of Open Access Books
2023
OAPEN (Open Access Publishing in European Networks)
2021
DOAB Directory of Open Access Books
2021
Springer Nature Link eBooks - Fully Open Access
2021
ScienceDirect
1973
OAPEN (Open Access Publishing in European Networks)
2018
DOAB Directory of Open Access Books
2018
DOAB Directory of Open Access Books
2018
ScienceDirect
2026-09-12 ~ 현재
ScienceDirect Open Access Titles
2026-01-01 ~ 현재
DOAB Directory of Open Access Books
2020
DOAB Directory of Open Access Books
2025
OAPEN (Open Access Publishing in European Networks)
2017
DOAB Directory of Open Access Books
2017
Books at JSTOR: Open Access
2017
De Gruyter Brill Open Access eBooks
2017
Taylor & Francis eBooks (Open Access)
2017
Project Muse Open Access ebooks
2017