- Observations Upon the Grammatical Structure and Use of the Umbundu: Or the Language of the Inhabitants of Bailundu and Bihe
- Observations Upon the Grammatical Structure and Use of the Umbundu: Or the Language of the Inhabitants of Bailundu and Bihe, and Other Countries of West Central Africa
- Observations Upon the Grammatical Structure and Use of the Umbundu or the Language of the Inhabitants of Bailundu and Bihe, and Other Countries of West Central Africa
- Observations Upon the Grammatical Structure and Use of the Umbundu or the Language of the Inhabitants of Bailundu and Bihe and Other Countries of West Central Africa




