(1949). Vol. 45, № 321, part 9; Transactions of the Faraday Society. 1949.
Dyfyniad Arddull ChicagoVol. 45, № 321, Part 9; Transactions of the Faraday Society. 1949, 1949.
Dyfyniad MLAVol. 45, № 321, Part 9; Transactions of the Faraday Society. 1949, 1949.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.