Porcelain
http://en.wikipedia.org/wiki/PorcelainHow porcelain is made
Collecting
www.howtocollectantiques.com - PorcelainBrands
The Spode societywww.nationalshelleychinaclub.com
Marks
http://www.porcelainmarksandmore.comhttp://users.skynet.be/rutrene/marks.html
http://www.mygrannysatticantiques.com