Cofnodi Dyfyniadau
Dyfyniad APA
(1676). [Tratado de astronomia].
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Dyfyniad Arddull Chicago
[Tratado De Astronomia]. 1676.
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Dyfyniad MLA
[Tratado De Astronomia]. 1676.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.