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平台:
EBSCOhost Academic Search Complete
(Available from 1990/01/01 until 1995/03/31.)
EBSCOhost Business Source Complete
(Available from 1990/01/01 until 1995/03/31.)
EBSCOhost Environment Complete
(Available from 1990/01/01 until 1995/03/31.)
EBSCOhost GreenFile
(Available from 1990/01/01 until 1995/03/31.)
EBSCOhost OmniFile Full Text Select
(Available from 1995/01/15 until 1995/04/15.)
EBSCOhost Science Reference Center
(Available from 1990/01/01 until 1995/03/31.)
ProQuest Agricultural & Environmental Science Database
(Available from 1988/01/01 until 1995/10/31.)
ProQuest SciTech Premium Collection
(Available from 1988/01/01 until 1995/10/31.)