Kasprus, Aloys a The tribes of the Middle Ramu and the Upper Keram Rivers (North-East New Guinea) / Aloys Kasprus. - St. Augustin Bei Bonn : Verlag Des Anthropos-Instituts, 1973. - 191 p., 2 leaves of plates : ill. ; 30 cm. - Studia Instituti Anthropos ; v.17. . Includes index. Bibliography: p. 7-8. Subjects--Topical Terms: Ethnology--Papua New Guinea