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平台:
EBSCOhost Academic Search Complete
(Available from 1961/09/01 until 2010/09/30.)
EBSCOhost Business Source Complete
(Available from 1961/09/01 until 2010/09/30.)
EBSCOhost Environment Complete
(Available from 1961/09/01 until 2010/09/30.)
EBSCOhost STM Source
(Available from 1961/09/01 until 2010/09/30.)
JSTOR Arts and Sciences X
(Available from 1961/10/01 volume: 1 issue: 1. Most recent 4 year(s) not available.)
ProQuest SciTech Premium Collection
(Available from 1993/01/01 volume: 33 issue: 2 until 2010/10/31 volume: 49 issue: 4.)