Reference sources are extremely useful for providing authoritative overviews and background information on a topic. They will give you the terminology and the key names, dates and concepts that can be used when conducting online searches for scholarly articles, books, as well as for searching for primary sources and historical newspapers. Many reference sources also provide extensive bibliographies that list the important and influential scholarship on a given topic.
USC has hundreds of reference books in print that provide authoritative background information to help you get started on your research. Here is just a sampling:
Encyclopedia of the United States in the 19th Century 3 vols. (2001)
Encyclopedia of the American Civil War: A Political, Social, and Military History 5 vols. (2001)
The Civil War Era and Reconstruction: An Encyclopedia of Social, Political, Cultural, and Economic History 2 vols. (2011)
Women in the American Civil War 2 vols. (2008)
Every Day of the Civil War: A Chronological Encyclopedia (2010)
Encyclopedia of the Reconstruction Era 2 vols. (2006)
Anti-Immigration in the United States: A Historical Encyclopedia 2 vols. (2011)
Encyclopedia of the Underground Railroad (2006)
Encyclopedia of the Gilded Age and Progressive Era 3 vols. (2005)
There are several ways to search for reference/background sources on your topic:
1) In the USC Libraries main search box, conduct a keyword search that includes the type of resource you're looking for:
native americans and bibliography
OR
slavery and encyclopedia
In the results page, select the Location: "Reference".
2) Another option is to search Reference Universe, an online tool that allows you to search for both print and online reference collections.
3) Go to the LA Times Reference Room in Doheny Memorial Library and browse the shelves.