| Auteur(s) | Pekkarinen, A. |
| Jaar | 1997 |
| Titel | Oligolectic bee species in Northern Europe (Hymenoptera, Apoidea). Entomologica Fennica 8: 205-214. |
| Auteur(s) | Pekkarinen, A. |
| Jaar | 1997 |
| Titel | Oligolectic bee species in Northern Europe (Hymenoptera, Apoidea). Entomologica Fennica 8: 205-214. |