Preventing the spread of maedi–visna in sheep through a voluntary control programme in Finland
| Autor: | Sihvonen, L *, Nuotio, L, Rikula, U, Hirvelä-Koski, V, Kokkonen, U.-M |
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| Zdroj: | In Preventive Veterinary Medicine 2000 47(3):213-220 |
| Databáze: | ScienceDirect |
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