| Avaa | Ingram, A. Ibbotson, A. Gallagher, M.
| The Ecology and Management of the European Grayling Thymallus thymallus (Linnaeus) : Interim Report | linkki | moniste | ekologia, harjus - harri, kalabiologia | Natur Environment Research Council | | 1999 | 84 | | | | I-Kalatutkimus: Harjus (avokotelo 3) |