Finding Secondary Sources
Bibliographies
Look for specialized subject bibliographies which may include secondary sources in the HOLLIS Catalog: Search, for example:
The SHAFR Guide: An Annotated Bibliography of U.S. Foreign Relations since 1600.
Oxford Bibliographies Online are literature guides in several humanities and social sciences areas.
Periodical Indexes
America: History and Life (1955- ) includes books, book chapters, journal articles, and book reviews.
Historical Abstracts (1954- ) includes books, book chapters, journal articles (but not book reviews) for non-North American history, 1450-date.
Royal Historical Society Bibliography is a comprehensive bibliography of secondary sources dealing with the British Isles, British Empire and Commonwealth from 55 BC to the present.
Web of Science Citation Indexes allow citation searching, that is, starting with an article of interest and finding more recent articles that have cited it. More information.
JSTOR offers full-text of complete runs (up to about 5 years ago) of over 400 journals. Allows simultaneous or individual searching, full-text searching optional, of many historical journals. List of included journals.