Nigerian surveys.
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| Format: | Texto biblioteca |
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| Published: |
1958
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| Subjects: | EXTENSION ACTIVITIES, FARMS, AGRICULTURAL SECTOR, SURVEYS, SAMPLING, YIELDS, LIVESTOCK, VULGARISATION, EXPLOITATION AGRICOLE, EXTENSION, EXPLOTACIONES AGRARIAS, SECTEUR AGRICOLE, ENQUETE, ECHANTILLONNAGE, RENDEMENT, BETAIL, SECTOR AGRARIO, ENCUESTAS, MUESTREO, RENDIMIENTO, GANADO, |
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