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Dyfyniad Arddull ChicagoHetman, Francois. Society and the Assessment of Techology. Paris: OECD, 1973.
Dyfyniad MLAHetman, Francois. Society and the Assessment of Techology. Paris: OECD, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.