Bibliography

Bibliography of Vitality:
1998. "1994 Population and Housing Census of Ethiopia, Results At Country Level." 1: Central Statistical Office. Online: https://www.msu.edu/~hudson/Ethlgslist.htm.
Bibliography of Locations:
2005. "The World Atlas of Language Structures." edited by Bernard Comrie et al. Oxford University Press.
Bibliography of Context:
1998. "1994 Population and Housing Census of Ethiopia, Results At Country Level." 1: Central Statistical Office. Online: https://www.msu.edu/~hudson/Ethlgslist.htm.