title: [The biologic nature of viruses].
mesh_terms: D005075:Biological Evolution; D055598:Chemical Phenomena; D002621:Chemistry; D004279:DNA, Viral; D009698:Nucleoproteins; D010684:Philosophy; D012367:RNA, Viral; D009626:Terminology as Topic; D014779:Virus Replication; D014780:Viruses
chemical_list: D004279:DNA, Viral; D009698:Nucleoproteins; D012367:RNA, Viral
vernacular_title: Problema biologicheskoĭ prirody virusov.