Databases are multidisciplinary collections of scholarly resources. Most databases gather links to and citations for scholarly articles, although some contain additional information on books and other resources.
These resources will help you find e-books and print held by Notre Dame, other local libraries, or books held at other libraries worldwide. If you can't find a book at Notre Dame or its partner libraries in the ND Catalog, try searching the catalogs of 9000 OCLC partner institutions through Worldcat. The Hathi Trust is another sizeable consortial collection of digitized books.
Bibliographies collect publication information for books, articles, and other resources on a particular subject. Some include annotations with additional details about the publications' contents. They have a narrower focus, covering a topic, movement, person, geographic location, or era.
These resources will help you find unpublished theses and dissertations, which present an author's research and findings as part of their degree candidacy or professional qualification.