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Dyfyniad Arddull ChicagoBHATT , N.D. GEOMETRICAL & MACHINE DRAWING. ANAND: CHAROTAR PUB. HOUSE, 1992.
Dyfyniad MLABHATT , N.D. GEOMETRICAL & MACHINE DRAWING. CHAROTAR PUB. HOUSE, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.