| Avaa | Toivonen, Jorma
| The Fish Fauna and Limnology of Large Oligotrophic Glacial Lakes in Europe (about 1800 A.D.) | linkki | artikkeli | kala - kalat, limnologia, vesieläimistö | Journal of the Fisheries Research Board of Canada | Canada | 1972 | 9 | | | Eripainos: Journal of the Fish... | Kotelo: Jorma Toivonen ; H-Limnologia (avokotelo 3) |