(1938). Vol. 16, № 16 (Vol. 30, № 32); Industrial and Engineering Chemistry. New Edition. 1938.
Dyfyniad Arddull ChicagoVol. 16, № 16 (Vol. 30, № 32); Industrial and Engineering Chemistry. New Edition. 1938, 1938.
Dyfyniad MLAVol. 16, № 16 (Vol. 30, № 32); Industrial and Engineering Chemistry. New Edition. 1938, 1938.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.