Collings, G. H. (1947). Commercial Fertilizers: Their sources and use. Blakiston.
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Citação norma Chicago
Collings, Gilbeart Hooper. Commercial Fertilizers: Their Sources and Use. Philadelphia, Toronto: Blakiston, 1947.
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Citação norma MLA
Collings, Gilbeart Hooper. Commercial Fertilizers: Their Sources and Use. Blakiston, 1947.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.