|Native to||Papua New Guinea|
|Region||Sepik River basin|
Boiken (Nucum, Yangoru) is one of the more populous of the Ndu languages of Sepik River region of northern Papua New Guinea. It is spoken in Yangoru-Saussia District, East Sepik Province and adjacent islands off the north coast of northern Papua New Guinea.
- Boiken at Ethnologue (18th ed., 2015)
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Boikin". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
- Eberhard, David M.; Simons, Gary F.; Fennig, Charles D., eds. (2019). "Papua New Guinea languages". Ethnologue: Languages of the World (22nd ed.). Dallas: SIL International.
- Paradisec houses two collections of Arthur Capell's materials that include Boiken (AC1 and AC2) as well as notes from Don Laycock's work (DL2) all of these collections are open access.
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