Hamel, G. (1921). Mechanik: T. 1.
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Dyfyniad Arddull Chicago
Hamel, Georg. Mechanik: T. 1. Leipzig, Berlin, 1921.
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Dyfyniad MLA
Hamel, Georg. Mechanik: T. 1. 1921.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.