DOAB Directory of Open Access Books
2020
EBSCO Open Access Journals
1997-01-01 ~ 현재
ScienceDirect
1980
ScienceDirect
1979
ScienceDirect
1977
ScienceDirect
1982
ScienceDirect
1981
ScienceDirect
1978
OAPEN (Open Access Publishing in European Networks)
2011
DOAB Directory of Open Access Books
2011
DOAB Directory of Open Access Books
2011