U.S. Federal Census data, U.S. Indian Census Rolls (1885-1940), slave schedules for the 1850 and 1860 U.S. Federal Census, genealogy and local history books, city directories, and more.
Archives of Chicago Defender (1909-1975), St. Louis Post Dispatch (1874-1922), The Jewish Exponent (1887-1990), Los Angeles Times (1881-1994), The New York Times (1851-2014), and The Washington Post (1877-2001).