@book{ BA0143494X, author = "Reesink, Ger P.", title = "Structures and their functions in Usan : a Papuan language of Papua New Guinea", publisher = "J. Benjamins Pub. Co.", year = "1987", series = "Studies in language companion series / series editors, Werner Abraham, Michael Noonan", number = "v. 13", URL = "https://ci.nii.ac.jp/ncid/BA0143494X" }