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Dyfyniad Arddull ChicagoJones,Frederic H, and Martin,Lloyd. Autocad Database Book: Accessing and Managing CAD Drawing Information. 3. New Delhi: Galgotia Publications, 1990.
Dyfyniad MLAJones,Frederic H, and Martin,Lloyd. Autocad Database Book: Accessing and Managing CAD Drawing Information. 3. Galgotia Publications, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.