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Simons;, Paul M. Lewis; Gary F. and Fennig, Charles D. (eds.) 2013. Ethnologue: Languages of the World, 17th Edition. 17th edn. Dallas, Texas: SIL International.

@book{661209,
  address   = {Dallas, Texas},
  edition   = {17th},
  editor    = {Simons;, Paul M. Lewis; Gary F. and Fennig, Charles D.},
  publisher = {SIL International},
  title     = {Ethnologue: Languages of the World, 17th Edition},
  url       = {http://www.ethnologue.com},
  year      = {2013},
  hhtype    = {comparative (computerized assignment from "languages")},
  inlg      = {English [eng]},
  local_ids = {92920},
  src       = {elcat}
}