Alderson, W. e. (1965). Patents and progress; the sources and impact of advancing technology. R. D. Irwin.
Dyfyniad Arddull ChicagoAlderson, Wroe ed. Patents and Progress; the Sources and Impact of Advancing Technology. Homewood, Ill: R. D. Irwin, 1965.
Dyfyniad MLAAlderson, Wroe ed. Patents and Progress; the Sources and Impact of Advancing Technology. R. D. Irwin, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.