The National geographic magazine map of the new Balkan states and central Europe [cartographic material] / prepared by J.G. Bartholomew ; Gilbert H. Grosvenor, editor.Bartholomew, J. G. (John George), 1860-1920National Geographic Society (U.S.)[1914]Issued with National Geographic magazine, vol. 26, no. 2, August, 1914.Relief shown by spot heights.cartographic