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SciFinder Regstration: read the setup instructions, and click SciFinder Registration. SciFinder requires a one-time registration, and you'll need to create a username and password when you login to use it.
For examples of searching in Web of Science and SciFinder, refer to Find Articles (Examples).
Indexes 18,000+ journals and 180,000 conference proceedings, heavily in the sciences and engineering. Easy interface for building and/or searches to include alternative keywords. Article records include cited and citing references, with related articles identified based on common citations. Good place to begin your search.
A better alternative to searching Google because it searches the scholarly literature rather than "everything." Very limited tools for refining searches, but you can go into the advanced search to limit a word or phrase be found in the title only. Indexes at the full text article level so it may identify articles not found in other databases.