Condense information into a general overview.
May be written by scholars in the field.
Provide details about key people & events - use this info to refine your searches.
Contain suggestions for further reading.

Find reference materials for your project. In GIL keyword search, combine keywords for your topic with one of the following:
Formery History Reference Center. Covering topics in U.S. and world history from the earliest civilizations through the 21st century. Featuring the full text from leading history periodicals, reference books, encyclopedias, and nonfiction books.
Berkshire encyclopedia of world history
American national biography
Encyclopedia of the American Civil War: a political, social, and military history
Encyclopedia of U.S. labor and working-class history
Collins atlas of World War II
Historical dictionary of the Arab-Israeli conflict