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Dyfyniad Arddull ChicagoTransneft. Classical Mechanics. Annual Report 2019. Moscow, Transneft, 2020, 2020.
Dyfyniad MLATransneft. Classical Mechanics. Annual Report 2019. Moscow, Transneft, 2020, 2020.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.