@Article{16700,
     author = "Magdalena Witwińska",
     title = "Prace badawcze w Krzemionkach Opatowskich w roku 1960 ",
     year =  1961,
     volume =  6,
     number =  3,
     journal =  Kwartalnik Historii Nauki i Techniki,
     pages =  s. 541,
    }