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Dyfyniad Arddull ChicagoBernal, J. D. Science in History: Vol.2: The Scientific and Industrial Revelution. [3d ed.]. Cambridge, Massachusetts, 1965.
Dyfyniad MLABernal, J. D. Science in History: Vol.2: The Scientific and Industrial Revelution. [3d ed.]. 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.