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  1. 1

    Field demostration its effects on level of knowledge, understanding and ittitudes of farmers about choice of a rice variety and use of fertilizers [microform] por Villegas, Leopoldo M.

    Publicado 1977
    Visual Material

    Field demostration its effects on level of knowledge, understanding and ittitudes of farmers about choice of a rice variety and use of fertilizers [microform]
  2. 2

    Field demonstration its effects on level of knowledge, understanding and attitudes of farmers about choice of a rice variety and use of fertilizers por Villegas, Leopoldo M.

    Publicado 1977
    Visual Material

    Field demonstration its effects on level of knowledge, understanding and attitudes of farmers about choice of a rice variety and use of fertilizers
  3. 3

    Field demonstration its effects on level of knowledge, understanding and attitudes of farmers about choice of a rice variety and use of fertilizers por Villegas, Leopoldo M. 1936-

    Publicado 1966
    Thesis

    Field demonstration its effects on level of knowledge, understanding and attitudes of farmers about choice of a rice variety and use of fertilizers

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