Não informado. (1968). Rhodesian journal of agricultural research. Department of Research and Specialist Services.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Rhodesian Journal of Agricultural Research. Salisbury, Zimbabwe: Department of Research and Specialist Services, 1968.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Rhodesian Journal of Agricultural Research. Department of Research and Specialist Services, 1968.
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