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Dyfyniad Arddull ChicagoBrown, T., and L. Rushton. Mortality in the UK Industrial Silica Sand Industry: 1. Assessment of Exposure to Respirable Crystalline Silica. BMJ Group, 2005.
Dyfyniad MLABrown, T., and L. Rushton. Mortality in the UK Industrial Silica Sand Industry: 1. Assessment of Exposure to Respirable Crystalline Silica. BMJ Group, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.