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  1. 1
    Marginal soil, marginal farms : a report on the Mutomo soil and water conservation programme, Kenya

    Marginal soil, marginal farms : a report on the Mutomo soil and water conservation programme, Kenya 由 Omoro, Ben

    出版 1987
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  2. 2
    Why Kenyans save their soil : a report on the soil conservation programme in Nyeri District, Kenya

    Why Kenyans save their soil : a report on the soil conservation programme in Nyeri District, Kenya 由 Omoro, Ben

    出版 1987
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