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Dyfyniad Arddull ChicagoLogical Operations Inc. DBase 5.0 for Windows. USA: McGraw-Hill, 1995.
Dyfyniad MLALogical Operations Inc. DBase 5.0 for Windows. McGraw-Hill, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.