Thank you @DocJohn

Over the years, I found the following helpful:

1. Book: A Fractured Mind by Robert B. Oxnam
2. Hospital: River Oaks (Trauma Center), New Orleans, LA
3. Web searches (bringing me to various websites)
4. Peer-reviewed research articles and news about research (e.g., Brand's works, Kluft's works, Lowenstein's works) - that is, when I was a student

I've not always found online support groups for DID helpful. Some were okay for a while, but then it became either retraumatizing for me or even for others from me. I suppose "hurting people hurt people" is a real thing.