British Ceramic Research Association. (1963). Symposium mineral dust in industry. Her majesty's stationery office.
Dyfyniad Arddull ChicagoBritish Ceramic Research Association. Symposium Mineral Dust in Industry. London: Her majesty's stationery office, 1963.
Dyfyniad MLABritish Ceramic Research Association. Symposium Mineral Dust in Industry. Her majesty's stationery office, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.