title: SOME PRELIMINARY OBSERVATIONS ON FILAMENTOUS AND RNA BACTERIOPHAGES.
mesh_terms: D001435:Bacteriophages; D004583:Electrons; D008853:Microscopy; D008854:Microscopy, Electron; D012313:RNA; D012317:RNA Phages; D012367:RNA, Viral
chemical_list: D012367:RNA, Viral; D012313:RNA
keywords: BACTERIOPHAGE; MICROSCOPY, ELECTRON; RNA, VIRAL