Polenske, K. R. (1974). State estimates of technology, 1963. Lexington Books.
Dyfyniad Arddull ChicagoPolenske, Karen R. State Estimates of Technology, 1963. Lexington, Mass.: Lexington Books, 1974.
Dyfyniad MLAPolenske, Karen R. State Estimates of Technology, 1963. Lexington Books, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.