Cofnodi Dyfyniadau
Dyfyniad APA
Martins J. Ávila & Ribeiro Maria Luísa. (1979). Carta geológica de Portugal na escala de 1: 50000. Serv. Geológicos de Portugal.
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Dyfyniad Arddull Chicago
Martins J. Ávila and Ribeiro Maria Luísa. Carta Geológica De Portugal Na Escala De 1: 50000. Serv. Geológicos de Portugal, 1979.
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Dyfyniad MLA
Martins J. Ávila and Ribeiro Maria Luísa. Carta Geológica De Portugal Na Escala De 1: 50000. Serv. Geológicos de Portugal, 1979.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.