Specialized encyclopedias (as well as dictionaries and handbooks) can be great places to start your research, especially if you need to gather some background information, define some terms, or understand a theory.
Most of the resources listed here are online but there are many others available only in print--many in the Reference Collection in Geisel Library. Ask a librarian for help in locating others.
There are many other specialized encyclopedias & dictionaries available from the Library. Check with a librarian for help in finding others, or look at our LibGuides for other topics.