GOLDWATER, R.:, Bambara Sculpture from the Western Sudan, New York, 1960; Lem, F.-H.: Sculptures Soudanaises, Paris, 1948; Holas, B.: Sculpture Sénoufo, Abidjan, 1969; Roy, C.: Art of the Upper Volta Rivers, Meudon, 1987; Fagg, W. and Forman, W. and B.: L'art Nègre ivoires afro-portugais, Prague, 1959; and 24 other volumes of similar interest (29)