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2. Comment. The spread of maedi-visna virus;Anonymous;Vet. Rec.,1984
3. Biomedical computer programs P-series;BMDP,1979
4. Prevalence of ovine progressive pneumonia in a sampling of cull sheep from western and midwestern United States;Cutlip;Am. J. Vet. Res.,1977
5. Immunodiffusion test for ovine progressive pneumonia;Cutlip;Am. J. Vet. Res.,1977