ScienceDirect
2002-01-01 ~ 현재
DOAJ: Directory of Open Access Journals
2006-01-01 ~ 현재
DOAB Directory of Open Access Books
2018
ScienceDirect
1977
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1989
DOAB Directory of Open Access Books
2019
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2024-03-01 ~ 현재
DOAJ: Directory of Open Access Journals
2024-01-01 ~ 현재
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2016-01-01 ~ 현재
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