National geographic

• 

  Año 1967, Vol. 131, Número 6

  • Illinois, the city and the plain

    Robert Paul Jordan

    págs. 745-797

    

  • French riviera: storied playground on the Azure Coast

    Carleton Mitchell

    págs. 798-835

    

  • First conquest of Antarctica's highest peaks

    Nicholas B. Clinch

    págs. 836-863

    

  • First La Gorce medal honors Antarctic expedition

    págs. 864-867

    

  • Caribbean green turtle: imperiled gift of the sea

    Archie Carr

    págs. 876-890