Não informado. (1971). ADAS Quarterly Review. Agricultural Development and Advisory Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. ADAS Quarterly Review. London: Agricultural Development and Advisory Service, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. ADAS Quarterly Review. Agricultural Development and Advisory Service, 1971.
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