David Dalby, 1999/2000, The Linguasphere register of the world's languages and speech communities. Observatoire Linguistique, Linguasphere Press. Volume 2, pp. 390–410 (zone 51) 27 Ağustos 2014 tarihinde Wayback Machine sitesinde arşivlendi.. Oxford.
David Dalby, 1999/2000, The Linguasphere register of the world's languages and speech communities. Observatoire Linguistique, Linguasphere Press. Volume 2, pp. 390–410 (zone 51) 27 Ağustos 2014 tarihinde Wayback Machine sitesinde arşivlendi.. Oxford.