Many colleges and universities share high quality academic materials on the web. Start your Google search by adding the phrase "SITE:.EDU" to your search string.
Digital archive provides access to a wide variety of documents: personal narratives and memoirs, pamphlets and political speeches, sermons and songs, legal treatises and children's books about Michigan.
American Memory Collection - Library of Congress Written and spoken words, sound recordings, images, prints, maps, and sheet music from the collections of the Library of Congress.
American President: An Online Reference Resource In-depth information reviewed by scholars on each president and administration.
American Presidency Project Public papers, presidential elections, inaugural addresses.
National Archives and Records Administration - From the official preserver of Federal records, many documents of historical interest.