Pew Research Center

The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy.

Internet Archive is a non-profit digital library that provides public access to collections of digitized materials, including websites, software, games, music, videos, images, and millions of books.

Google Scholar provides a simple way to search for scholarly literature broadly. Search across a wide variety of disciplines and sources: articles, theses, books, abstracts, and court opinions.