Paper help

[dragon-element.livejournal.com]

I'm in need of a few pointers... I'm writing a 15 page research paper on the Arthurian age, and the rough draft is due in a week. My paper is going to centre around the historical aspect of King Arthur and his reign (what he changed/did/created and how his reign impacted the many cultures that followed). Does anyone know of any reliable non-fiction books that may be of help to me? So far I have The Age Of Arthur by John Morris and The Return To Camelot Chivalry And The English Gentleman by Mark Girouard. And would anyone happen to know of any good online sites and articles that may be of use to me?

Thank you!