Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'Yogaratham, Ponnampalam 1939-', amser ymholiad: 0.01e Mireinio'r Canlyniadau
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    Use of chemicals in lieu of land preparation in flooded rice [microform] gan Yogaratham, Ponnampalam 1939-

    Cyhoeddwyd 1974
    Visual Material

    Use of chemicals in lieu of land preparation in flooded rice [microform]

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