Bergsland, Knut and Vogt, Hans. 1962. On the Validity of Glottochronology. Current Anthropology 3.2. 115-153.
@article{jacquesestimative-bergsland62glotto, author = {Bergsland, Knut and Vogt, Hans}, journal = {Current Anthropology}, pages = {115-153}, title = {On the Validity of Glottochronology}, volume = {3.2}, year = {1962} }