Cofnodi Dyfyniadau
Dyfyniad APA
Portugal Serviços Geológicos de Portugal. (1955). Carta Geológica de Portugal. Serv. Geológicos de Portugal.
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Dyfyniad Arddull Chicago
Portugal Serviços Geológicos de Portugal. Carta Geológica De Portugal. Serv. Geológicos de Portugal, 1955.
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Dyfyniad MLA
Portugal Serviços Geológicos de Portugal. Carta Geológica De Portugal. Serv. Geológicos de Portugal, 1955.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.