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Dyfyniad Arddull ChicagoHarper, F. A. Liberty, a Path to Its Recovery. Irvington-on-Hudson, N.Y: Foundation for Economic Education, 1949.
Dyfyniad MLAHarper, F. A. Liberty, a Path to Its Recovery. Foundation for Economic Education, 1949.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.