More information on Claritas Segmentation & Market Solutions is available on the Claritas 360 Guide.
You may also want to look at the Marketing LibGuide, by Gabriella Reznowski, WSU's Business and Economics Librarian.
WSU does not have a subscription Nielsen's premium database but much is available free on their website, and this data can be very useful when looking at marked segmentation. Nielsen provides featured insights and reports on their website, http://www.nielsen.com/us/en.html.