[Tsvetan Angelovich Kristanov (on his 70th birthday and 50th year of scientific, pedagogic and social activity].
D002031:Bulgaria; D003880:Dermatology / Q000266:history; D049673:History, 20th Century; D012749:Sexually Transmitted Diseases / Q000266:history
Tsvetan Angelovich Kristanov (k 70-letiiu so dnia rozhdeniia i k 50-letiiu nauchnoĭ, pedagogicheskoĭ i obshchestvennoĭ deiatel'nosti)