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Dyfyniad Arddull ChicagoSabbata, Venzo De. Spin and Torsion in Gravitation. Singapore: World Scientific, 1994.
Dyfyniad MLASabbata, Venzo De. Spin and Torsion in Gravitation. Singapore: World Scientific, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.