Não informado. AERR. University of Illinois at Urbana-Champaign, Agricultural Experiment Station.
Citace podle Chicago (17th ed.)Não informado. AERR. Urbana, Ill: University of Illinois at Urbana-Champaign, Agricultural Experiment Station.
Citace podle MLA (8th ed.)Não informado. AERR. University of Illinois at Urbana-Champaign, Agricultural Experiment Station.
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