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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 em 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 em 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 em 1966
    Tese

    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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