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APA Citation
Carpenter, R. G., Cochrane, A. L., Clarke, W. G., Jonathan, G., & Moore, F. (1993). death rates of miners and ex-miners with and without coalworkers' pneumoconiosis in South Wales. Occupational and environmental medicine, 50(7), 577. http://access.bl.uk/ark:/81055/vdc_100144236327.0x000040