B. Nyborg · Bernhard Nievergelt
| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| Ibexes in an African Environment | 978-3-642-67960-5 (3-642-67960-9) | 1981 |
| Ibexes in an African Environment: Ecology and Social Systems of the Walia Ibex in the Simen Mountains, Ethiopia | 978-3-540-10592-3 (3-540-10592-1) | 1981 |