Published by Kegan Paul International for the International African Institute with the assistance of UNESCO and the federal government of Nigeria1983.<KM56-A6>
by Patricia L. CarrellCambridge University Press in association with the West African Languages Survey and the Institute of African Studies, Ibadan2010
P. Akụjụọobi NwachukwuPublished by Kegan Paul International for the International African Institute with the assistance of UNESCO and the Federal Government of Nigeria1983
edited by E. 'Nolue Emenanjo, I.A.O. Umeh, J.U. Ugoji ; sponsored by the Nigerian Educational Research and Development Council ; and compiled by the Otu Iwelite Asụsụ na Omenaala Igbo (the Society for Promoting Igbo Language and Culture)University Press Limited1990-