1. Immunodiffusion test for ovine progressive pneumonia;Cutlip;Am. J. Vet. Res.,1977
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3. Intrauterine transmission of ovine progressive pneumonia virus;Cutlip;Am. J. Vet. Res.,1981
4. Antibody formation in zwoegerziekte, a slow infection in sheep;DeBoer;J. Immunol.,1970
5. Classification and Nomenclature of Viruse: Second Report of the International Committee on Taxonomy of Viruses;Fenner,1976