1.

図書
図書
1. Sprung from some common source : investigations into the prehistory of languages
edited by Sydney M. Lamb and E. Douglas Mitchell
出版情報: Stanford, Calif. : Stanford University Press, c1991
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2.

図書
図書
2. On the origin of languages : studies in linguistic taxonomy
Merritt Ruhlen
出版情報: Stanford, CA : Stanford University Press, c1994
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