Dissociation in the UK http://www.dissociation.co.uk
Information in the UK on Dissociation and Dissociative Identity Disorder (DID) provided by The Pottergate Centre for Dissociation. Lists organisations, training, research, and information on how to find a therapist.
Dissociation.com http://www.dissociation.com/
Extensive writings by Ralph Allison, M.D., one of the pioneers in treating multiplicity, explicating his unusual theory about the difference between Dissociative Identity Disorder and Multiple Personality Disorder.