Mansfield, E. (1968). The economics of technological change ([1st ed.].). W. W. Norton.
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Dyfyniad Arddull Chicago
Mansfield, Edwin. The Economics of Technological Change. [1st ed.]. New York: W. W. Norton, 1968.
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Dyfyniad MLA
Mansfield, Edwin. The Economics of Technological Change. [1st ed.]. W. W. Norton, 1968.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.