1997, Heidi Bieber, Traces of Antiquity in Genes: Comparative Study of Serum Protein Polymorphisms Between Populations of Africa, Europe and Amerindians of Central America (→ISBN), page 14:
The hypothetial Nostratic is regarded by Ramer not as the „ur“-language, which he called Proto-World (Pinker, 95), but might be one of ist[sic] major branches. Greenberg has his own version of the Nostratic hypothesis: his Eurasiatic overlaps with Nostratic, but also includes other languages like Japanese and Eskimo-Aleut, and his third class of Amerindish is one of the three „ur“-language-branches (Greenberg & Ruhlen, 94).
