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平台:
EBSCOhost Academic Search Complete
(Available from 1993/07/01.)
EBSCOhost Business Source Complete
(Available from 1993/07/01.)
EBSCOhost OmniFile Full Text Select
(Available from 1993/07/01.)
EBSCOhost STM Source
(Available from 1993/07/01.)
ProQuest SciTech Premium Collection
(Available from 1988/01/01.)