If you have identified a research work (article, book, or dissertation) that addresses the topic or question you are interested in ---- please look in its bibliography. You will surely find a list of archival sources that you may also wish to consult.
For example, here are some of the archives consulted for Kevin Kruse's White flight : Atlanta and the Making of Modern Conservatism
CC |
Calvin Craig Papers, Special Collections, Robert W. Woodruff Library, Emory University, Atlanta |
FCSC |
Records, Fulton County Superior Court, Atlanta |
GGDP |
Georgia Government Documentation Program, Special Collections, William Russell Pullen Library, Georgia State University, Atlanta |
NAACP |
National Association for the Advancement of Colored People Papers, Microfilm Edition |
And many more
You can also "triangulate" to additional archives if you know one archive you are interested in.
For example, suppose you know that you are interested in the Jacob M. Rothschild Papers. But you are wondering, "what other archives have scholars used in conjunction with the Rothschild papers?"
Use Google Books. Enter "Jacob M. Rothschild Papers" (in quotation marks). The search results will include any book in the Google database that mentions the Rothschild papers.
Then you can go to the bibliographies in those books and see what other archives are being used.
For example, the results from the Rothschild papers search include Clive Webb's Fight Against Fear: Southern Jews and Black Civil Rights.
In Webb's bibliography, we find:
And many more.