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Dyfyniad Arddull ChicagoLitwiniszyn, J. Stochastic Methods in Mechanics of Granular Bodies. Wien: Springer-Verlag, 1974.
Dyfyniad MLALitwiniszyn, J. Stochastic Methods in Mechanics of Granular Bodies. Springer-Verlag, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.