Exchange and advisory visits - Visit to eastern Africa, Jun-Jul 1962.
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| Format: | Texto biblioteca |
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1963
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| Subjects: | INSECT CONTROL, ACRIDIDAE, SPRAYING, AERIAL APPLICATION, OPERATING COSTS, FARM EQUIPMENT, EXPERIMENTATION, LUTTE ANTIINSECTE, CONTROL DE INSECTOS, PULVERISATION, EPANDAGE AERIEN, COUT OPERATIONNEL, MATERIEL AGRICOLE, PULVERIZACION, APLICACION AEREA, COSTOS DE EXPLOTACION, EQUIPO DE LA EXPLOTACION AGRARIA, EXPERIMENTACION, |
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