BASTIN, M.-L.: La Sculpture Tshokwe, Meudon, 1982; Chaffin, A. and F.: L'art Kota, Meudon, 1979; Bourgeois, A.P.: Art of the Yaka and Suku, Meudon, 1984; Widstrand, C.G.: African Axes, Uppsala, 1958; Cornet, J.: A Survey of Zairian Art The Bronson Collection, Raleigh, 1978; and 16 others of similar interest (21)