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Dyfyniad Arddull ChicagoMALVERN, Lawrence. Engineering Mechanics: Statics. Englewood Cliffs: Prentice-Hall, 1976.
Dyfyniad MLAMALVERN, Lawrence. Engineering Mechanics: Statics. Prentice-Hall, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.