Merritt Ruhlen Related books A Guide to the World's Languages: Volume I, Classification (Guide to the World's Languages) Stanford Univ Pr • 1987 GUIDE TO THE WORLDS LANGUAGES V1 Stanford Univ Pr • 1991 On the Origin of Languages: Studies in Linguistic Taxonomy Stanford Univ Pr The Origin of Language: Tracing the Evolution of the Mother Tongue John Wiley & Sons Inc • 1996