Bruce L. Gardner and Gordon C. Rausser. (2001). Agricultural Production. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Bruce L. Gardner and Gordon C. Rausser. Agricultural Production. ELSEVIER, 2001.
Lua MLA (8ú heag.)Bruce L. Gardner and Gordon C. Rausser. Agricultural Production. ELSEVIER, 2001.
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