HathiTrust Digital Library includes full-text of materials, many out of copyright (1923 or before), and records of later materials to theVanderbilt community from the a partnership of major U.S. academic and research libraries.
Google Books. Searches the full text of books and selected journals and magazines that Google has scanned. This includes The Crisis, Ebony, Jet, and a few other African American interest magazines from the 20th century.