| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Ekoid Bantu Languages of Ogoja, Eastern Nigeria | 978-0-521-17527-2 (0-521-17527-5) | 2011 | |
| Ekoid Bantu Languages of Ogoja, Eastern Nigeria, Part 1, Introduction, Phonology and Comparative Vocabulary: Pt. 1 | 978-0-521-07364-6 (0-521-07364-2) | 1968 | |
| Ekoid Bantu Languages of Ogoja: Volume 1, Introduction, Phonology and Comparative Vocabulary | 978-1-108-01333-8 (1-108-01333-3) | 2010 | Joseph H. Greenberg |
D.C. · D. Crabb · D.W. · David C. · David Crabb · David W. · W.C.