User:CourtneyReko
 | This user is a student editor in Central_Michigan_University/African_Art_(Fall_2019). |
This is a good start. The sources are good, though the formatting is inconstant. Biebuyck has other writings you might want to look at, too.
There's more out there on the Mbole, and what you have isn't quite enough yet. Look broader with your search terms (Zaire, Congo, Forest, Mongo, etc.).
Please go back and add to the list of sources. If you'd like help locating more sources, come see me.