| Auteur(s) | Edwards, M. Williams, P.H. |
| Jaar | 2004 |
| Titel | Where have all the bumblebees gone, and could they ever return? British Wildlife 15: 305-312. |
| Auteur(s) | Edwards, M. Williams, P.H. |
| Jaar | 2004 |
| Titel | Where have all the bumblebees gone, and could they ever return? British Wildlife 15: 305-312. |