Yulgok
Links
Yulgok Yi I (1536-1584)
http://homepage.ruhr-uni-bochum.de/Sven.K.Herbers-Lee/dateien/ygyy.html
Bibliography of primary and secondary sources in various languages.
Ojukheon Municipal Museum
Place where Yulgok and his mother, Shin Saimdang, lived. Information on buildings, exhibits, and history.
History of Tae Kwon Do: Yulgok
http://www.franklinsidekicks.com/YiYi.htm
Concise biography of this Korean thinker.