| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Peoples of Ethiopia: Lowlands - Highlands - Hinterlands | 978-1-9O8531-64-3 (1-9O8531-64-9) | 2017 | Philip Briggs (preface by) |
Robert W. · Robert Whiting · Robert Whitting · Robert Whittingham · Robert Whittington