KWPN - Royal Warmblood Studbook of the Netherlands; for jumping, dressage, carriage, and Gelderlander horses. Includes news, history, events, results, and photos. Located in Harderwijk, Netherlands. - http://www.kwpn.nl/cms/index.jsp?lang=2
NA/WPN - North American Department, Royal Warmblood Registry/Studbook of the Netherlands. - http://www.nawpn.org/