Another good place to check for primary sources is:
CLICK ON THE IMAGE ABOVE FOR MORE INFORMATION ON CATALOGS, DATABASES, AND OTHER ONLINE RESOURCES, COURTESY OF THE NATIONAL ARCHIVES
These resources may help you to build the "larger" picture of your topic.
Library of Congress Digital Collections: Newspapers, photographs, documents, and other materials from the Library of Congress's extensive collections
Making of America: The Cornell University Library Making of America Collection is a digital library of primary sources in American social history from the antebellum period through reconstruction
Documenting the American South: Contains texts, images, and audio files related to southern history, literature, and culture, from the University of North Carolina libraries
World Digital Library- Provides free access to maps, photographs, manuscripts, sound recordings, and documents from around the globe
Primary Sources from DocsTeach: Thousands of online primary source documents from the National Archives to bring the past to life
The National Archives Catalog: Find online primary source material from The National Archive's Online Catalog
Our Documents: 100 Milestone Documents in American History
We highly recommend a newspapers.com subscription. newspapers.com can be accessed online through Ramsey Library, but a personal subscription provides access to much more material.