Sources - Encyclopedias Encylopedias are collections of short, factual entries often written by different contributors who are knowledgeable about the topic.
General encyclopedias provide concise overviews on a wide variety of topics.
Subject encyclopedias contain in-depth entries focusing on one field of study. The best place to find an encyclopedia is in a library. However, a few encyclopedias can be found on the Web, usually accessible only to subscribers.