title: THE STRUCTURE OF VISNA VIRUS STUDIED BY THE NEGATIVE STAINING TECHNIQUE.
mesh_terms: D004396:Coloring Agents; D004583:Electrons; D008853:Microscopy; D008854:Microscopy, Electron; D016624:Negative Staining; D012106:Research; D013194:Staining and Labeling; D014714:Vertebrates; D014780:Viruses; D014790:Visna-maedi virus
chemical_list: D004396:Coloring Agents
keywords: EXPERIMENTAL LAB STUDY; MICROSCOPY, ELECTRON; STAINS AND STAINING; VERTEBRATE VIRUSES