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Dyfyniad Arddull ChicagoArizona,Tucson. Optimum Structural Design. US: US office of naval research, 1981.
Dyfyniad MLAArizona,Tucson. Optimum Structural Design. US office of naval research, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.