Besides using the Search & Find search on the library home page and then unchecking the box on the left sidebar that excludes newspaper articles, here are databases focusing specifically on newspapers.
Includes World Newspaper Archive, including African Newspapers; African American Periodicals 1825-1995; Black Authors, 1556-1922: Imprints from the Library Company of Philadelphia; Early American Imprints, Series I: Evans, (1639-1800); Early American Imprints, Series II: Shaw-Shoemaker, (1801-1819); Early American Newspapers, Series 1 (1690-1876) and Series 2 (1758-1900).
Searchable full-image of the Chicago Defender (1909-2010), Chicago Tribune (1849-1999), Los Angeles Times (1881-2000), St. Louis Post-Dispatch (1874-2003), New York Times (1851-2020), Wall Street Journal (1889-2012), Washington Post (1877-2007), Kansas City Call (1919-2010), Pittsburgh Courier (1911-2010), and the St. Louis American (1949-2010).