title: [Professor Nikolaĭ Nikolaevich Aleksandrov (on his 50th birthday].
mesh_terms: D049673:History, 20th Century; D009369:Neoplasms / Q000266:history; D011871:Radiology / Q000266:history; D002094:Republic of Belarus
vernacular_title: Professor Nikolaĭ Nikolaevich Aleksandrov (k 50-letiiu so dnia rozhdeniia)