Bibliography

Bibliography of Vitality:
Sepik languages: checklist and preliminary classification
Bibliography of Locations:
Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian. 2014.
Glottolog 2.3. Leipzig: Max Planck Institute for Evolutionary Anthropology. (Available online at http://glottolog.org)
Bibliography of Context:
Ethnologue: Languages of the World, Twenty-first edition