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  1. 1

    Co-orientation and technological change communication variables in perceptions of 'miracle rice' in the Philippines por Groot, Hans Cornelis 1939-

    Publicado 1970
    Libro

    Co-orientation and technological change communication variables in perceptions of 'miracle rice' in the Philippines
  2. 2

    Agricultural journalism por Groot, Hans Cornelis 1939-

    Publicado 1964
    Libro

    Agricultural journalism

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