Robert, E. . .. (1950). Extraction of Non-ferrous metals. Temple press ltd Bowling Green lane.
Dyfyniad Arddull ChicagoRobert, E.R. Extraction of Non-ferrous Metals. London: Temple press ltd Bowling Green lane, 1950.
Dyfyniad MLARobert, E.R. Extraction of Non-ferrous Metals. Temple press ltd Bowling Green lane, 1950.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.