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Citação do estilo Chicago (17ª ed.)Association of Exploration Geochemists. Journal of Geochemical Exploration. Amsterdam: Elsevier Science Publishers, 1972.
Citação MLA (8ª ed.)Association of Exploration Geochemists. Journal of Geochemical Exploration. Elsevier Science Publishers, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.