Great for exhibition and marketing issues in case studies. This is an excellent site for gaining an overview of these areas, too. Explore "Audience," Planning and Buying," etc. and look over their graphics. You can also take advantage of the "Advanced Search" link to find information on audiences/demographics, etc. for past releases. Don't forget to tick the box for "include past releases."
http://business.pearlanddean.com/
http://business.pearlanddean.com/