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Dyfyniad Arddull ChicagoInstitution of Mechanical Engineers. First European Tribology Congress. London: I M E, 1973.
Dyfyniad MLAInstitution of Mechanical Engineers. First European Tribology Congress. I M E, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.