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Dyfyniad Arddull ChicagoWolf, Lawrence J. Statics and Strength of Materials: A Parallel Approach to Understanding Structures. New York: Macmillan, 1990.
Dyfyniad MLAWolf, Lawrence J. Statics and Strength of Materials: A Parallel Approach to Understanding Structures. Macmillan, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.