Other Reference Sources: Bibliographies
You have seen bibliographies listed in reference books, but there are also book length bibliographies on specific topics. They contain a list of writings on one subject.
If you find a bibliography on your topic, note its publication date and, if necessary, update the information with periodical indexes. Another way of discovering whether any new material has been published is to search Books in Print. This resource lists in-print, out-of-print, and forthcoming books.