Summon database description: "Summon is the default search on the library's home page. Summon is a powerful search tool that provides easy and fast discovery of relevant information from the UC Libraries collections on any topic. It is the place to start research in journal and newspaper articles, books, government documents, maps, music recordings, videos, digital collections, and more. From your search results, it's one step to the full text of articles or finding if a book is on the shelf."
Google Scholar Connect searches across the internet for similar material