Reference
| Title | Libellulinen, in Cat. Coll. de Selys Longchamps, Fasc. 9-16 |
| Type | Book (part) |
| Authors(s) | Ris, F. |
| Year | 1909-1919 |
| Pages | 1-1278 |
| Title | Libellulinen, in Cat. Coll. de Selys Longchamps, Fasc. 9-16 |
| Type | Book (part) |
| Authors(s) | Ris, F. |
| Year | 1909-1919 |
| Pages | 1-1278 |