Não informado. (1972). Journal of agronomic education. American Society of Agronomy.
Chicago-viite (17. p.)Não informado. Journal of Agronomic Education. Madison, Wis: American Society of Agronomy, 1972.
MLA-viite (8. p.)Não informado. Journal of Agronomic Education. American Society of Agronomy, 1972.
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