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平台:
DOAJ Directory of Open Access Journals
(Available from 1999.)
EBSCOhost Academic Search Complete
(Available from 2005/01/01.)
EBSCOhost Library, Information Science & Technology Abstracts with full text(LISTA)
(Available from 2005/01/01.)
PubMed Central Open Access
(Available from 1999 volume: 1.)