Question: Anna Riva (1922–2003) was the pen name of who, a well-known American occult author and manufacturer of Hoodoo spiritual supplies, a traditional African American folk spirituality that developed from a number of West African spiritual traditions and beliefs? 
Sentence (from "Anna Riva"): Anna Riva (1922–2003) was the pen name of Dorothy Spencer, a well-known American occult author and manufacturer of hoodoo spiritual supplies.
Relevant evidence: Yes