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U.S. History

Reference Sources: Overview

Historical research is often informed by reference materials from many disciplines. Reference online and in print brings together some of the library's many reference works while providing tips on how to locate others.  The types of works profiled in this guide include dictionaries, encyclopedias, thesauri, grammar and usage guides, biographical sources, sources for quick facts, directories and bibliographies, across the disciplines.  

Reference resources come in several formats.  Online resources will be shown by title in NUsearch.  Print resources are also listed in NUsearch, by title.  Print resources which do not circulate are available in the main library periodical room.  For more information, send us an IM, email or call us.

Encyclopedias, Historical Dictionaries, & Other Reference Resources

The library's collection of reference sources are listed in NUsearch.  You may search by title, keyword, or subject heading. 

To use the subject search, you must use a valid Library of Congress (LC) subject heading.  LC maintains a list of valid subject headings.  To use this list, type your subject into the search box, choose an LC subject heading from the drop down menu, and hit enter.  A list of "official" subject headings will appear.  

Foreign Language Dictionaries