This page recommends collections of sources likely to be of particular use for HIS 346: United States Since 1945. There are many such collections available freely on the Web. In general, it's better to look initially for a broad category (e.g. Florida history primary sources) than for a specific name or event. Once you've located a useful collection using Google or another search engine, you can use that site's search tools to locate more specific information.
Contains every issue of the New York Times published from September 18, 1851 (its first issue) to 3 years prior to the current year, including all articles, illustrations, and advertisements.
Full-text historical newspaper covering African American life, civil rights, segregation, and legislation. More than two thirds of its readership resided outside of Chicago.