A guide to the languages of the world

Autor: Ruhlen, Merritt
Impresum 1976

A guide to the world's languages : volume 1: classification

Autor: Ruhlen, Merritt
Impresum 1987

A guide to the world's language : with a postscript on recent developments

Autor: Ruhlen, Merritt
Impresum 1987

A guide to the world's language : with a postscript on recent developments. Vol. 1, Classification. A guide to the world's language

Autor: Ruhlen, Merritt
Matična publikacija: A guide to the world's language (1991)

The origin of language : tracing the evolution of the mother tongue

Autor: Ruhlen, Merritt
Impresum 1994

A guide to the world's languages : Volume 1: Classification

Autor: Ruhlen, Merritt
Impresum 1991