Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'Franzel, Steven', amser ymholiad: 0.01e Mireinio'r Canlyniadau
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    Comparing formal and informal survey techniques for farming systems research a case study from Kenya gan Franzel, Steven, Crawford, Eric W.

    Cyhoeddwyd 1987
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    Comparing formal and informal survey techniques for farming systems research a case study from Kenya

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