National geographic

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  Año 1987, Vol. 172, Número 6

  • Oldest known shipwreck reveals splendors of the Bronze Age

    George F. Bass

    págs. 693-732

    

  • Sea change in the Sea Islands: "nowhere to lay downs weary head"

    Charles L. Blockson

    págs. 735-763

    

  • Nomads' land: a journey through Tibet

    Sorrel Wilby

    págs. 764-785

    

  • What is this thing called sleep?

    Michael E. Long

    págs. 787-821

    

  • Red crabs on the March on Christmas Island

    John W. Hicks

    págs. 822-831