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    Agronomic assessment of soil conservation techniques used in upland farming systems of the Philippines report on a visit to the Philippines, 11th-25th March 1994 nork Gutteridge, R.C. (Ross C.)

    Argitaratua 1994
    Liburua

    Agronomic assessment of soil conservation techniques used in upland farming systems of the Philippines report on a visit to the Philippines, 11th-25th March 1994

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