平台:
DOAJ Directory of Open Access Journals
(Available from 1985 until 2016.)
ProQuest SciTech Premium Collection
(Available from 2012/01/01 until 2020/01/31.)
DOAJ Directory of Open Access Journals
(Available from 1985 until 2016.)
ProQuest SciTech Premium Collection
(Available from 2012/01/01 until 2020/01/31.)