Credo is an online fullt text database of over 400 reference sources. You can search them all together to bring up a variety of articles related to a topic.
Call Number: D11 .M39 1999 v. 1-4 REF (also an ebook, but the print is better organized)
This is an example of a chronological reference source, in which information is listed by date. These are helpful if you want to gain contextual information about a time period.