Here are some links that you may find interesting
and helpful in completing your assignment
The story of Frank Shepard's creation of his citation manual can be found here: http://www.oreillynet.com/xml/blog/2003/05/a_nineteenthcentury_linking_ap.html
The Supreme Court of the United States Case Citation Finder can be found here:
http://www.supremecourtus.gov/opinions/casefinder.html
After you complete this assignment, here is a short tutorial on how to use Lexis' Shepard's service:
http://support.lexis-nexis.com/academic/record.asp?ArticleID=au_shepards