| Parker, Elizabeth and Christine Durrant, compilers | Mundani-English lexicon | 1990 | | Linguistics |
| Mfonyam, Joseph N | Tone analysis and tone orthography | 1990 | Journal of West African Languages | Linguistics |
| Perrin, Mona | Notes on discourse in Gude | 1990 | | Linguistics |
| Watters, John R | Reduplication and the origin of high tone on noun prefixes in Ejagham | 1990 | Journal of West African Languages | Linguistics |
| Anderson, Stephen C.; Menetrey, Catherine | Tone in Gude -- A first look | 1990 | | Linguistics |
| Spreda, Klaus W. | Linguistic Notes on Metta | 1990 | | Linguistics |
| Hedinger, Robert | Verbal extensions in Akɔɔse, their form, meaning and valency changes | 1990 | | Linguistics |
| Hofmann, Erica | A preliminary phonology of Bana | 1990 | | Linguistics |
| Wiesemann, Ursula | Seven tones or two? Another look at complex tone systems in West Africa | 1990 | | Linguistics |
| Wiesemann, Ursula | The relationships between predicates | 1990 | Notes on Linguistics | Linguistics |
