America: History and Life is the definitive index of literature covering the history and culture of the United States and Canada, from prehistory to the present. With indexing for 1,700 journals from as far back as 1910, this database is without question the most important bibliographic reference tool for students and scholars of U.S. and Canadian history.
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Academic Search Complete
Proquest Central
---------------------------- these include thousands of full text journals in all disciplines and index many more
Other databases
American Memory - historical documents and media digitized by the Library of Congress
Digital Public Library of America - digitized history collections from libraries across the country
Local databases
Digitized local/regional history materials from Special Collections and Archives