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Dyfyniad Arddull ChicagoHall, Bronwyn H., and Nathan Rosenberg. Handbook of the Economics of Innovation. Amsterdam: Elsevier, 2010.
Dyfyniad MLAHall, Bronwyn H., and Nathan Rosenberg. Handbook of the Economics of Innovation. Elsevier, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.