Here are the main databases for scholarly articles on the colonial period in America:
America: History & Life The definitive index of literature covering the history and culture of the United States and Canada, from prehistory to the present. Provides indexing for 1,700 journals. How to export to RefWorks. Coverage: 1964-present
To find articles that are not available online in this database, be sure to use the link to determine if the article is available online in another database or in print in the library.