title: Comparative morphology and structural classification of retroviruses.
authors.affiliation: National Institute for Biological Standards and Control, South Mimms, Potters Bar, Herts, United Kingdom.
authors.forename: M V
authors.initials: MV
authors.lastname: Nermut
authors.forename: D J
authors.initials: DJ
authors.lastname: Hockley
mesh_terms: D008854:Microscopy, Electron; D012190:Retroviridae / Q000145:classification* / Q000502:physiology / Q000648:ultrastructure; D014771:Virion