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Dyfyniad APA
Vieira Inácio. (1714). Tractado da Optica.
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Vieira Inácio. Tractado Da Optica. 1714.
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Dyfyniad MLA
Vieira Inácio. Tractado Da Optica. 1714.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.