| Auteur(s) | Berezin M.V. |
| Jaar | 1990 |
| Titel | Ecology and nesting of bumblebees on Wrangel Island. Proc Colloq of All-Union Entomol Soc Section for the Study of Social Insects, 1st Colloquium. Leningrad, pp 19–28 |
| Auteur(s) | Berezin M.V. |
| Jaar | 1990 |
| Titel | Ecology and nesting of bumblebees on Wrangel Island. Proc Colloq of All-Union Entomol Soc Section for the Study of Social Insects, 1st Colloquium. Leningrad, pp 19–28 |