@misc{500181,
  address      = {Dallas},
  author       = {ISO 639-3 Registration Authority},
  howpublished = {https://iso639-3.sil.org/request/2009-020},
  number       = {2009-020},
  publisher    = {SIL International},
  title        = {Change Request Number 2009-020: adopted merge [drh], adopted update [khk] (2010-01-18)},
  url          = {https://iso639-3.sil.org/sites/iso639-3/files/change_requests/2009/2009-020.pdf},
  year         = {2009},
  hhtype       = {overview},
  lgcode       = {Darkhat [drh], Halh Mongolian [khk]},
  macro_area   = {Eurasia},
  src          = {iso6393}
}