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11
A socio-economic profile of Sitio Halang, an upland community in Rizal Province, Philippines
Publicado em 1995Livro -
12
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13
Soil conservation in an upland farming system in Bukidnon a socio-economic survey
Publicado em 1995Livro -
14
Soil conservation in an upland farming system in Palawan a socio-economic survey
Publicado em 1995Livro -
15
Soil conservation in an upland farming system in Nueva Viscaya a socio-economic survey
Publicado em 1995Livro -
16
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17
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18
Soil erosion and conservation in the Philippine uplands a review of the literature
Publicado em 1994Livro -
19
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20