FightingDirectory.info is a great resource containing links related to Chinese martial arts, Korean martial arts, Japanese martial arts, martial arts services, aikido, karate, taekwando, muay thai, chung moo doe, tang soo do and more.
Informal History of Chung Do Kwan Tae Kwon Do
Discusses Tae Kwon Do's origins and influences in general, concluding with Chung Do Kwan history.
http://www.sos.mtu.edu/husky/tkdhist.htm