Maria Sergeyevna Petrovykh (Russian: Мария Сергеевна Петровых, IPA: [mɐˈrʲijə sʲɪrˈɡʲe(j)ɪvnə pʲɪtrɐˈvɨx]; 26 March [O.S. 13 March] 1908 – 1 June 1979)...