EBSCO Open Access Journals
1983-01-01 ~ 2020-12-31
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
1999
DOAB Directory of Open Access Books
1997
OAPEN (Open Access Publishing in European Networks)
2024
DOAB Directory of Open Access Books
2024
DOAJ: Directory of Open Access Journals
2013-01-01 ~ 현재
DOAB Directory of Open Access Books
2007
DOAB Directory of Open Access Books
2013
De Gruyter Brill Open Access eBooks
2013
DOAB Directory of Open Access Books
2017
DOAB Directory of Open Access Books
2016