@Article{227850,
     author = "Józef Babicz",
     title = "Dwusetna rocznica urodzin Aleksandra Humboldta ",
     year =  1970,
     volume =  15,
     number =  1,
     journal =  Kwartalnik Historii Nauki i Techniki,
     pages =  s. 226-228,
    }