DOAB Directory of Open Access Books
2021
DOAB Directory of Open Access Books
2018
DOAB Directory of Open Access Books
2014
DOAB Directory of Open Access Books
2016
DOAB Directory of Open Access Books
2002
DOAB Directory of Open Access Books
1999
OAPEN (Open Access Publishing in European Networks)
2023
DOAB Directory of Open Access Books
2023
Brill Open e-Books
2023
OAPEN (Open Access Publishing in European Networks)
2023
DOAB Directory of Open Access Books
2023
DOAJ: Directory of Open Access Journals
2017-01-01 ~ 현재
EBSCO Open Access Journals
2009-01-01 ~ 현재
Sabinet African Journals Full Open Access Journal Collection
2009-01-01 ~ 현재