Não informado. (1980). Zimbabwe journal of agricultural research. Ministry of Lands, Agriculture and Rural Resettlement.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Zimbabwe Journal of Agricultural Research. Harare: Ministry of Lands, Agriculture and Rural Resettlement, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Zimbabwe Journal of Agricultural Research. Ministry of Lands, Agriculture and Rural Resettlement, 1980.
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