You may need to find scholarly, peer-reviewed articles for research in this class. You can find articles a variety of ways -- the first is to go directly to a scholarly journal that publishes on the topic you need. The second is to search within subject specific databases. Searching directly within a journal will give you results only from that journal, but you know you're looking at something directly related to your subject. Searching within databases will give you a broader spectrum of results, but some of them may be only tangentially related to your topic.
This page has a list of journals specifically relating to the intersection between Law and Art -- each journal has a description and is linked UMD's catalog. This page also has a list of law and/or art databases -- each database has a description and a link.