National geographic

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  Año 1931, Vol. 60, Número 2 (August)

  • On Mackenzies trail to the Polar Sea

    Amos Burg

    págs. 128-156

    

  • Along the Old Mandarin road of Indo-China

    W. Robert Moore

    págs. 157-200

    

  • The Island of Nias, at the edge of the world

    Mabel Cook Cole

    págs. 201-224

    

  • Madrid out-of-doors

    Harriet Chalmers Adams

    págs. 225-256