Online information sources for business and current affairs: An evaluation of textline, NEXIS, profile and DI-ALOG : David Nicholas and Gertrud Erbach, New York: Mansell, 1989. 297 pp. ISBN 0 7201 1878 6. £45.00
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论文评审过程：Available online 17 April 2002.
论文官网地址：https://doi.org/10.1016/0268-4012(90)90060-6
