title: [Electron microscopic study of old viral material].
mesh_terms: D003594:Cytoplasmic Granules; D006652:Histological Techniques; D007304:Insect Viruses / Q000302:isolation & purification*; D008854:Microscopy, Electron; D012281:Rickettsia / Q000302:isolation & purification*
vernacular_title: Elektronemikroskopische Untersuchung alter Virus-Materialien.