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1Texto bibliotecaIICA
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2by 113924 Ruff, S.R., 94156 Mielke, M.J., 6885 Department of Agriculture, Washington, D.C. (EUA)
Published 1984Texto bibliotecaIICA -
3by 111389 Roberts, D.H., 94156 Mielke, M.J., 6896 Department of Agriculture, Washington, D.C. (EUA). Economic Research Service
Published 1986Texto bibliotecaIICA