引文索引:不断发展 2004 2001 1997 ISI Web of Knowledge 3.0 ISI Web of 1992 Science ISI Web of IsI Web of Science 7.0 1989 THOMSON Knowledge Scientific BIOSIS SCI Essential science 1963ssC, Indicators L2.500 Web of 1958 AHCI Science on CD Current c2.000 Web of Customers Contents Science Worldwide Connect Customers Science Worldwide Citation Index Derwent Innovations Current Contents IndexCurrent Contents 1958 1963 1989 2001 Science Citation Index SCI, SSCI, AHCI on CD Current Contents Connect Derwent Innovations Index 1992 THOMSON Scientific 1997 ISI Web Of Science ISI Web of Knowledge Essential Science Indicators ~2,000 Web of Science Customers Worldwide 2004 ISI Web of Knowledge 3.0 ISI Web of Science 7.0 BIOSIS ~2,500 Web of Science Customers Worldwide 引文索引：不断发展