OAPEN (Open Access Publishing in European Networks)
2016
De Gruyter Brill Open Access eBooks
2017
DOAB Directory of Open Access Books
2016
OAPEN (Open Access Publishing in European Networks)
2025
DOAB Directory of Open Access Books
2025
ScienceDirect
1989
DOAB Directory of Open Access Books
2023
EBSCO Open Access Journals
2016-01-01 ~ 2021-12-31
DOAB Directory of Open Access Books
2017
ScienceDirect
2022
DOAB Directory of Open Access Books
2006
DOAB Directory of Open Access Books
1987
Project Muse Open Access ebooks
1987