@Article{318842,
     author = "Semen J. Płotkin",
     title = ""Woprosy Istorii Jestiestwoznanija i Tiechniki" ",
     year =  1971,
     volume =  16,
     number =  2,
     journal =  Kwartalnik Historii Nauki i Techniki,
     pages =  s. 449-451,
    }