biblio toscana

• National geographic

  Washington D.C. : National geographic Society, 19--?
• National geographic

  Washington : National geographic society, c1959-
• National geographic

  Washington, 1959-
• National geographic

  Washington : National geographic society, 1960-
• National geographic

  Washington D.C. : National Geographic Society, 1978-
• National geographic

  Roma : La repubblica : poi Gruppo editoriale L'espresso, 1998
• National geographic

  Roma : L'Espresso, 1998-
• National Geographic

  Washington : National Geographic Society, 1998-
• National geographic

  Roma : La Repubblica, 1998-
• 1: National Geographic

  Barcellona : RBA coleccionables, ©2006
• National geographic

  Roma : Divisione L'Espresso, 2007
• National geographic

  Roma : National geographic Italia, 2008