title: [N.G. Khlopin and evolutionary trends in histology].
mesh_terms: D005075:Biological Evolution; D006653:Histology / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D014586:USSR
vernacular_title: N.G. Khlopin i évolutsionnoe napravlenie v gistologii.