Não informado. (1948). What-s new in crops and soils. American Society of Agronomy.
Citace podle Chicago (17th ed.)Não informado. What-s New in Crops and Soils. Madison, Wis: American Society of Agronomy, 1948.
Citace podle MLA (8th ed.)Não informado. What-s New in Crops and Soils. American Society of Agronomy, 1948.
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