Não informado. (1963). Intensive Agriculture. Ministry of Agriculture and Rural Development, Directorate of Extension.
Citace podle Chicago (17th ed.)Não informado. Intensive Agriculture. New Delhi: Ministry of Agriculture and Rural Development, Directorate of Extension, 1963.
Citace podle MLA (8th ed.)Não informado. Intensive Agriculture. Ministry of Agriculture and Rural Development, Directorate of Extension, 1963.
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