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平台:
DOAJ Directory of Open Access Journals
(Available from 2000.)
EBSCOhost Academic Search Complete
(Available from 2000/01/01.)
EBSCOhost STM Source
(Available from 2000/01/01.)
ProQuest Agricultural & Environmental Science Database
(Available from 2000/01/01 until 2003/12/31. Available from 2005/01/01 until 2005/12/31. Available from 2014/01/01.)
ProQuest SciTech Premium Collection
(Available from 2000/01/01 until 2003/12/31. Available from 2005/01/01 until 2005/12/31. Available from 2014/01/01.)