Here are some useful references, taken from an article by Carl G. Kline, MBA, in Computer Freelancer, Vol. 4 No. 4, Summer '96.
Intellectual Property in the Information Age
http://homepage.seas.upenn.edu/~cpage/cis590/
Fair Use in the Electronic Age
http://arl.cni.org/scomm/copyright/uses.html
Copyright and E-mail
http://www.mindspring.com/~isenberg/papers.html
Information
Law Alert
http://infolawalert.com/
Negativland
http://sunsite.unc.edu:80/negativland/white.htm
Copyright Examples in the Articles Section of NCRI
http://www.referrals.com/articles/cright.htm
Overview of the U.S. Copyright system
http://utrc08.Admin.UTK.edu/overcopy.html
Ten Big Myths About Copyright Explained
http://www.clari.net/brad/copymyths.html