@Article{499770,
     author = "Henryk Kowgier",
     title = "Some remarks on the world production of gold in the period of 1900–2010 ",
     year =  2012,
     volume =  29,
     number =  ,
     journal =  Studia i Prace Wydziału Nauk Ekonomicznych i Zarządzania,
     pages =  s. 93-103,
    }