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            53Peasant indebtedness and the persistence of traditional credit institution [microform].Izdano 1980Visual Material
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            54Fishpond cooperators as communication links of improved fishpond practices [microform]Izdano 1980Visual Material
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            55Youth resources mobilization a developmental strategy in Maramag, Bukidnon [microform].Izdano 1980Visual Material
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            56A programming solution to the plant location-allocation problem in forestry [microform]Izdano 1980Visual Material
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