Querying Web Site Visitor Trend Data with Coordinated Nested Bar and Pie Charts.

Mark Sifer Querying Web Site Visitor Trend Data with Coordinated Nested Bar and Pie Charts. 1-2 2001 conf/vip/2001 VIP http://crpit.com/confpapers/CRPITV11Sifer1.pdf db/conf/vip/vip2001.html#Sifer01