Bibliography

Bibliography of Vitality:
Yade Grammar Essentials
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:
Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig (eds.). 2015. Ethnologue: Languages of the World, Eighteenth edition. Dallas, Texas: SIL International. Online version: http://www.ethnologue.com.