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2231
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2232
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2233
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2234
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2235
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2236
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2237
Sources of farm information of rice farmers in four Philippine barrios [microform]
Publicado 1977Visual Material -
2238
Effect of channel variation on message comprehension among extension workers [microform]
Publicado 1977Visual Material -
2239
A numerical study of bias estimation of variance in systematic sampling of Philippine households [microform]
Publicado 1977Visual Material -
2240