| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Igbo Language and Culture: v. 1 | 978-0-19-575275-5 (0-19-575275-9) | 1976 | F.Chidozie Ogbalu · E.N. Emenanjo |
| Igbo Language and Culture: v. 2 | 978-0-19-575829-0 (0-19-575829-3) | 1984 | F.Chidozie Ogbalu · E.N. Emenanjo |