title: A comparison of visna and maedi viruses. II. Serological relationship.
mesh_terms: D000818:Animals; D007118:Immunoassay; D066298:In Vitro Techniques; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology*; D014777:Virus Diseases / Q000662:veterinary*; D014713:Viruses, Unclassified / Q000276:immunology*