Não informado. (1963). Agricultural Science Review. Cooperative State Experiment Station Service, Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Agricultural Science Review. Washington: Cooperative State Experiment Station Service, Department of Agriculture, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Agricultural Science Review. Cooperative State Experiment Station Service, Department of Agriculture, 1963.
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