@article{thurgood1996language,
  source = {jstor},
  ISSN = {0097-8507},
  abstract = {The Chamic languages of Vietnam have undergone phonological restructuring in the last two thousand years. In contact with the Mon-Khmer languages, all have developed final stress with consequent phonotactic restructuring. Since then, some languages have remained essentially unchanged (Roglai, Rade, and Jarai), but others have undergone radical restructuring: in contact with register languages, Western Cham has become a register language; in contact with the phonology of Bahnar, Haroi has become a restructured register language; in contact with the tonal Vietnamese, Phan Rang Cham has become incipiently tonal; and, in contact with the fully tonal languages of Hainan, Tsat has become fully tonal. The internal paths of change are relatively clear, because of their shallow time depth combined with the richness of the comparative data. However, despite the existence of phonetically plausible internal paths of development, the available evidence makes it clear that external contact set the changes in motion and determined their direction.},
  author = {Thurgood, Graham},
  copyright = {Copyright 1996 Linguistic Society of America},
  journal = {Language},
  jstor_articletype = {Full Length Article},
  jstor_date = {199603},
  jstor_formatteddate = {Mar., 1996},
  month = {mar},
  number = {1},
  pages = {1--31},
  publisher = {Linguistic Society of America},
  title = {Language Contact and the Directionality of Internal Drift: The Development of Tones and Registers in Chamic},
  url = {http://links.jstor.org/sici?sici=0097-8507%28199603%2972%3A1%3C1%3ALCATDO%3E2.0.CO%3B2-5},
  volume = {72},
  year = {1996},
}