Não informado. (1968). Food Research Institute studies in agricultural economics, trade and development. Stanford University.
Chicago-referens (17:e uppl.)Não informado. Food Research Institute Studies in Agricultural Economics, Trade and Development. Stanford, Conn: Stanford University, 1968.
MLA-referens (8:e uppl.)Não informado. Food Research Institute Studies in Agricultural Economics, Trade and Development. Stanford University, 1968.
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