Não informado. (1955). Commercial fertilizer and plant food industry. W.W. Brown Publishing.
Chicago-viite (17. p.)Não informado. Commercial Fertilizer and Plant Food Industry. Atlanta, Ga: W.W. Brown Publishing, 1955.
MLA-viite (8. p.)Não informado. Commercial Fertilizer and Plant Food Industry. W.W. Brown Publishing, 1955.
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