2Walrath J, Frawmens JF. Cancer and other causes of death ernbalmers[J ]. Cancer Res, 1984,44: 4638.
3Holmstrorn M, Wilhemsson B. Respiratory systems and pathophysiological effects of occupational exposure to formaldehyde and wood dust [J]. Scand work environ health, 1988, 14:306.
4Blair A. Moratality among industried workers exposed to formaldehyde[J]. JNCI, 1986,176:1071.
