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Dyfyniad Arddull ChicagoGranger, John V. Technology and International Relations. SanFrancisco: Freeman, 1979.
Dyfyniad MLAGranger, John V. Technology and International Relations. SanFrancisco: Freeman, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.