Humanities Index. New York: Wilson, 1974–. An interdisciplinary index to about 400 of the most prominent English-language journals in the humanities, including art, music, history, and literature. Searchable by author or subject, the index includes many cross-references and subheadings that break large topics into components. This index is available in print and electronic formats; in some libraries, the database includes full text of selected articles.

JSTOR. New York: JSTOR, 1995–. A multidisciplinary historical archive of scholarly journals. The complete contents of core journals have been digitized from the first issues. The most current issues (typically from the past three to five years are not included). This archive is useful to historians for two reasons: many prominent history journals are included (such as the American Historical Review) and, because the contents go back to the nineteenth century, full-text searches can reveal the historical development of concepts, words, and phrases in scholarly publications.

Social Sciences Citation Index. Philadelphia: Institute for Scientific Information, 1956–. A multidisciplinary index of social science journals, including history, women's studies, and urban studies. Searchable by author or keyword, the index gives bibliographic citations, 60 percent of which include extracts. It allows searches by cited source, a good way to trace the influence of a particular work. The online version, Web of Science, has a "related search" feature for identifying works that cite one or more of the same sources.

Bedford/St. Martin's HistoryLinkshttp://bcs.bedfordstmartins.com/hrel/newhistorylinks Provides annotated, selective links relevant to U.S., ancient, and Western history. Categories include chronological periods and regions as well as topics such as immigration, race, the industrial revolution, and women and feminism.

Best of History Websiteshttp://www.besthistorysites.net/index.shtml Though the audience for this site is K-12 history teachers, it is a useful and up-to-date guide to reputable Web sites, arranged by region and period, with links to art history, maps, news, and teaching materials. The site is maintained by Tom Dacord of the Center for Teaching History with Technology.

WWW Virtual Library: History Central Cataloguehttp://vlib.iue.it/history/index.html The premier meta-site for history, organized by research methods and materials, historical topics, countries and regions, and eras and epochs.

American Historical Association Guide to Historical Literature. Ed. Mary Beth Norton and Pamela Gerardi. 3rd ed. 2 vols. New York: Oxford University Press, 1995. Offers citations of important historical publications, arranged in 48 sections covering theory, international history, and regional history. Though it does not include recent publications, it remains an indispensable guide to the best work in the field.

Dictionary of Historical Terms. By Chris Cook. 2nd ed. New York: Peter Bedrick, 1990. Covers a wide variety of terms related to historical events, places, and institutions in a remarkably small package. This is a good place for quick identification of terms used by historians.

Encyclopedia of Historians and Historical Writing. Ed. Kelly Boyd. 2 vols. London: Fitzroy Dearborn, 1999. Provides information on historians, on regions and periods, and on topics in the field such as history of religion, women's and gender history, and art history.