This is not exhaustive by any means. However, here are a few examples of resouces you might consult as you seach online
Other nearby libraries may have print collections that are valuable for you to use. Look particularly at Ohio State University and the Ohio Historical Society.
There are a few special collections available online that have primary documents.
Series 1 & 2 cover 1827-1998 and includes papers from more than 35 states. Nearly 360 newspapers are featured, chronicling a century and a half of the African American experience. Covers life in the Antebellum South, the Jim Crow Era, the Great Migration, Harlem Renaissance, Civil Rights movement, and more.