Use these links for information about types of secondary sources in the library:
"Secondary sources provide historians, both experienced and beginning, with two very important types of information: secondary sources are useful in providing background information about a topic; secondary sources help to provide historical context." Doing History; Researching and Writing in the Digital Age. 2nd ed. Michael J. Galgano, J. Chris Arndt, Raymond M. Hyser. 2008. Wadsworth. pp. 5-6.
Secondary sources not only provide background and research on a topic but often reveal in their bibliographies and notes the primary sources used. Start with a reliable book or dissertation on your subject, then study the references used in the writing of the work and locate relevant citations by searching the library catalog.