Bergsland and Vogt 1962

Bergsland, Knut & Hans Vogt. 1962. On the validity of glottochronology. Current Anthropology 3. 115-153.

@misc{7764,
  author = {Bergsland, Knut and Vogt, Hans},
  title  = {On the validity of glottochronology. Current Anthropology 3. 115-153},
  year   = {1962}
}