Cofnodi Dyfyniadau
Dyfyniad APA
Oliveira José Tomás & Portugal Serviços Geológicos de Portugal. (1992). [Beja]. Serviços Geológicos de Portugal.
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Dyfyniad Arddull Chicago
Oliveira José Tomás and Portugal Serviços Geológicos de Portugal. [Beja]. Serviços Geológicos de Portugal, 1992.
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Dyfyniad MLA
Oliveira José Tomás and Portugal Serviços Geológicos de Portugal. [Beja]. Serviços Geológicos de Portugal, 1992.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.