North Star Archery: www.northstararchery.com

Sir Erika Bjornsdottir. She sells combat archery supplies and has several how-to articles.
 

Duke Patrick Devilin of Darkwrath Keep’s most excellent article on combat archery tactics: http://www.spookyfx.com/book/ARCHERY.html
An excellent article that talks about how heavy fighters can defend themselves against combat archers, and how combat archery can be more effective on the battlefield. 

IKCAC (Inter Kingdom Combat Archery Competition):
http://detommaso.org/ikac/ikcak/ikcac.html