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Dyfyniad Arddull ChicagoRensberger, Boyce. "Progress Shortened Ancient Folk's Lives." Today 1998.
Dyfyniad MLARensberger, Boyce. "Progress Shortened Ancient Folk's Lives." Today, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.