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  1. 1

    The probable impact of the seed-fertilizer revolution on grain production and on farm labor requirements por Barker, Randolph

    Publicado 1972
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    Libro

    The probable impact of the seed-fertilizer revolution on grain production and on farm labor requirements
  2. 2

    Employment and technological change in Philippine agriculture

    Publicado 1971
    Libro

    Employment and technological change in Philippine agriculture

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