Não informado. (1938). Agricultural Finance Review. U.S. Department of Agriculture, Economic Research Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Agricultural Finance Review. Washington: U.S. Department of Agriculture, Economic Research Service, 1938.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Agricultural Finance Review. U.S. Department of Agriculture, Economic Research Service, 1938.
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