@Article{150628,
     author = "Ryszard Sroczyński",
     title = "Wynalazek kompasu w Chinach i problem jego przekazu do Europy ",
     year =  1969,
     volume =  14,
     number =  1,
     journal =  Kwartalnik Historii Nauki i Techniki,
     pages =  s. 31-51,
    }