Gerbrands, A.A.: The Asmat of New Guinea, The Journal of Michael Clark Rockefeller, New York, 1967; Van Baaren, Th.P.: Korwars and Korwar Style, The Hague, 1968; Kooijman, S.: The Art of Lake Sentani, New York, 1959; Newton, D.: Art Styles of the Papuan Gulf, New York, 1961; Fuhrmann, E.: Neu-Guinea, Hagen, 1922; Lewis, A.B.: Decorative Art of New Guinea, Incised Designs, Chicago, 1925; Bodrogi, T.: Art in North-East New Guinea, Budapest, 1961; and sixteen other volumes of similar interest (23)