@Article{43583,
     author = "",
     title = "Rocznice wielkich geografów: Aleksandra Humboldta, Albrechta Pencka i Alfreda Hettnera ",
     year =  1961,
     volume =  6,
     number =  4,
     journal =  Kwartalnik Historii Nauki i Techniki,
     pages =  s. 726-727,
    }