References
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- Herrick , R. F. and Stewart , P. A. 1991 . International Workshop on Retrospective Exposure Assessment for Epidemiological Studies . Appl. Occup. Environ. Hyg. , 6 : 417 – 418 .
- Goldberg , M. and Hemon , D. 1993 . Occupational Epidemiology and Assessment of Exposure . Int. J. Epidemiol. , in press