National geographic

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  Año 1979, Vol. 155, Número 1

  • Humpbacks: the gentle whales

    Sylvia A. Earle

    págs. 2-17

    

  • Humpbacks: their mysterious songs

    Roger Payne

    págs. 18-25

    

  • Los Angeles: city in search of itself

    William S. Ellis

    págs. 26-59

    

  • Man in the Amazon: Stone Age present meets Stone Age past

    W. Jesco von Puttkamer

    págs. 60-82

    

  • The incredible crystal diamonds

    Fred Ward

    págs. 85-113

    

  • Bison kill by Ice Age hunters

    Dennis Stanford

    págs. 114-121

    

  • Sri Lanka: time of testing for an ancient land

    Robert Paul Jordan

    págs. 123-150