Letters in this collection were published in the following book by Katherine Bell Banks describing her family's relationship with W.E.B. Du Bois:
Banks, Katherine Bell and Robert C. Hayden. William E.B. Du Bois, Family and Friendship: Another Side of the Man. Littleton, Mass.: Tapestry Press, Ltd., 2004.

For materials related to W.E.B. Du Bois, see:

• W.E.B. Du Bois Papers, 1803-1979.