15. Conclusion
The overview presented in this article represents the core of chemical information. The sources cited illustrate, without claiming to be exhaustive, the solutions proposed by the main database producers. The complete satisfaction of information needs in chemistry goes far beyond this panorama, not least because of the central position of chemistry within science and technology.
The multiplication and rapid evolution of distribution technologies, particularly the Internet, and the economic upheavals they entail, lead us to give priority to the content of sources rather than the means of access. For the latter, rather than rapidly incomplete or even obsolete information, it is preferable to refer to specialized publications, such as the Gale Directory of Database
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