Williamson, K. 1970. Reading and Writing Ogbia. (Rivers Readers Project, Institute of African Studies, University of Ibadan).
@book{Williamson-1970, author = {Williamson, K.}, note = {Rivers Readers Project, Institute of African Studies, University of Ibadan}, title = {Reading and Writing Ogbia}, year = {1970}, iso_code = {ogb}, olac_field = {typology; general_linguistics; phonetics; phonology}, wals_code = {ogb} }