Electronic Resources at the Boston Athenӕum include databases which can contain reference works, newspapers, journals, books, and more. Beneath each of the resources, you can click "Additional Information" to see what each offers.
Many databases contain full-text, but some only offer a citation to where the information may be found in print. In that case, you can search the online catalog Athena to see if the Athenӕum holds the material you seek. If not, you can make an interlibrary loan request.