Credo Reference is an online reference source that covers every major subject and is selected from a range of reference types - including general and subject encyclopedias, dictionaries, biographies, bibliographies, chronologies, handbooks, atlases, images, videos, journal articles, books in both the libraries at UNT and other libraries, etc. In addition to allowing individual searches for topics you are researching, it includes a large number of already prepared topic pages.
Each topic page also lists related topic pages on the right hand side at the beginning of the page.