Mansfield, E. (1968). Industrial research and technological innovation: An econometric analysis ([1st ed.].). Norton.
Dyfyniad Arddull ChicagoMansfield, Edwin. Industrial Research and Technological Innovation: An Econometric Analysis. [1st ed.]. New York: Norton, 1968.
Dyfyniad MLAMansfield, Edwin. Industrial Research and Technological Innovation: An Econometric Analysis. [1st ed.]. Norton, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.