To limit to authoritative websites, choose your preferred domain (.edu, .gov or .org) by adding site:.domain
Example
site:.org to your search.
Be sure not to include any spaces between site: and the domain.
For natural phrases such as muscular dystrophy, be sure to use quotations.
Example: "muscular dystrophy"
Contains the full texts of thousands of scholarly and reference e-books from several publishers, covering many subject areas.
An online resource that includes articles from academic journals, newspapers, magazines; audio; videos; opinion essays; and primary sources on current controversial issues. A good source of topic ideas for papers and speeches.