I found wonderful resouce of information that I use to research any new information concerning Dissociative Disorders and it also had information on just about anything you can think of once you learn how to surf for topics which is very easy. It is the About.com site and the exact url to find information for dissociative disorders is as follows..http://mentalhealth.about.com/od/dissociative You'll know you've found the correct page when you see the following discription of Dissociative Disorders.
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Mental Health Resources
Dissociative Disorders
Dissociative disorders such as Dissociative Identity Disorder (multiple personality disorder) usually result from trauma or abuse in early childhood. A controversial disorder in some circles, the evidence is mounting that this is a legitimate diagnosis.
About.com also has very good information on depression and PTSD once you start learning how to follow the links.