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Dyfyniad Arddull ChicagoSmith, Ian. Smith's Elements of Soil Mechanics. Chichester, West Sussex: Wiley/Blackwell, 2014.
Dyfyniad MLASmith, Ian. Smith's Elements of Soil Mechanics. Chichester, West Sussex: Wiley/Blackwell, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.