| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| King Leopold, England, and the Upper Nile, 1899-1909 | 978-0-300-00375-8 (0-300-00375-7) | 1968 | |
| Revolutionary Sudan Revolutionary Sudan: Hasan Al-Turabi and the Islamist State, 1989-2000 Hasan Al-Turabi and the Islamist State, 1989-2000 | 978-90-04-13196-5 (90-04-13196-5) | 2003 | Millard Burr · J. M. Burr |
**O.C.** · O'collins · Professor Robert O. Collins · R. C. · R. Collins · Robert O. Collins · Robert O., Editor Collins