FIRTH, R.: Art and Life in New Guinea, London, 1936; Lewis, A.B.: Decorative Art of New Guinea, Chicago, 1925; Lewis, A.B.: New Guinea Masks, Chicago, 1922; Fuhrmann, E.: Neu-Guinea, Hagen, 1922; Hurley, F.: Pearls and Savages, New York, 1924; Kooijman, S.: The Art of Lake Sentani, New York, 1959; and Landtman, G.: Ethnographical collection from the Kiwai District of British New Guinea, Helsinki, 1933 (7)