EZRA, K.: Royal Art of Benin, New York, 1992; Robbins, W. and Nooter, N.: African Art in American Collections, Washington, 1989; 19 copies of African Arts magazine; 20 copies of the journal of the University Museum, Philadelphia (1912-1925); 119 copies of Expedition, the bulletin of the University Museum, Philadelphia (1958-1989); and 13 other publications (163)