Making of America is an excellent resource for digitized journals, magazines and books primarily published during the Antebellum period.
Chronicling America: Historic American Newspapers
New York Times Historical (Access through the library link) Open Archives Initiative OAIster
Digital Collections at Duke University
Chronicling America provides digital versions of selected U.S. newspapers published between 1836 and 1922.
Chronicling America provides digital versions of selected U.S. newspapers published between 1836 and 1922.