title: [Roentgenological service in the Perm district].
mesh_terms: D049673:History, 20th Century; D011859:Radiography / Q000266:history*; D012426:Russia; D012425:Russia (Pre-1917); D013679:Technology, Radiologic / Q000266:history
vernacular_title: Rentgenologicheskaia sluzhba Permskoĭ oblasti.